#1C39BBoklch(0.4230 0.2047 266.5)
Persian blue (#1C39BB) is a dark vivid blue. In OKLCH it has lightness 42.3%, chroma 0.205 and hue 266.5°; its relative luminance is 6.8%. White text reads best on it (APCA Lc 94, WCAG 8.93:1). The closest RAL Classic paint is RAL 5005 Signal blue (ΔE00 8.1). In plain ISCC-NBS terms it is a vivid purplish blue. It is outside the FOGRA39 coated print gamut: the closest printable color is #394C99 (ΔE00 5.3).
#1C39BB in every format
| HEX | #1C39BB |
| RGB | rgb(28 57 187) |
| HSL | hsl(229.1 74.0% 42.2%) |
| HSB / HSV | hsb(229.1 85.0% 73.3%) |
| HWB | hwb(229.1 11.0% 26.7%) |
| CMYK (formula) | cmyk(85/70/0/27) |
| CMYK (FOGRA39 coated) | cmyk(93/78/0/0) |
| CIELAB (D50) | lab(29.92 30.47 -72.38) |
| LCh | lch(29.92 78.53 292.8) |
| OKLab | oklab(0.4230 -0.0126 -0.2043) |
| OKLCH | oklch(0.4230 0.2047 266.5) |
| CIE XYZ (D65) | color(xyz-d65 0.10911 0.06761 0.47745) |
| CIE xyY | xyY(0.1668 0.1033 0.0676) |
| Display P3 | color(display-p3 0.1373 0.2208 0.7053) |
| Linear sRGB | color(srgb-linear 0.01161 0.04092 0.49693) |
| CSS name | — |
Text on #1C39BB
White textWCAG 8.93:1 · APCA Lc 94
Black textWCAG 2.35:1 · APCA Lc 14