#1F42BC#1F42BC
#1F42BC is a dark, vivid blue. Relative luminance 0.078; OKLCH L 44.1% C 0.195 H 265.8°. Best body text is #FFFFFF at 8.19:1 contrast (WCAG AA passes).
Color values
| HEX | #1F42BC |
|---|---|
| RGB | rgb(31, 66, 188) |
| HSL | hsl(227, 72%, 43%) |
| HSV | hsv(227, 84%, 74%) |
| CMYK | cmyk(83.5%, 64.9%, 0%, 26.3%) |
| CIE-LAB | lab(33.60, 34.13, -67.19) |
| CIE-LCH | lch(33.60, 75.36, 296.93°) |
| OKLab | oklab(44.07% -0.0143 -0.1946) |
| OKLCH | oklch(44.07% 0.195 265.8) |
| XYZ | xyz(11.5872, 7.8172, 48.4654) |
| Luminance | 0.0782 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Blue Blue
#2242C7
ΔE00 1.59
Sapphire (survey)
#2138AB
ΔE00 3.58
Cobalt
#0047AB
ΔE00 4.27
Blue (survey)
#0343DF
ΔE00 4.32
Ocean Blue
#4F42B5
ΔE00 5.56
Sapphire
#0F52BA
ΔE00 5.89
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#1F42BC #BC991F
analogous
#1F90BC #1F42BC #4A1FBC
triadic
#1F42BC #BC1F42 #42BC1F
tetradic
#1F42BC #BC1F90 #BC991F #1FBC4A
square
#1F42BC #BC1F90 #BC991F #1FBC4A
split-complementary
#1F42BC #BC4A1F #90BC1F
monochromatic
#0E1D53 #163087 #1F42BC #3A5EDE #6E89E7
Accessibility & contrast
On white
8.19
#1F42BC on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.56
#1F42BC on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #1F42BC
8.19:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##1F42BC | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##1F42BC | 1.00 | 8.19 | 2.56 | 8.19 |
| #FFFFFF | 8.19 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.56 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.19 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#0057C0
Deuteranopia (green-blind)
#0048BA
Tritanopia (blue-blind)
#006379
Achromatopsia (no color)
#4F4F4F
Design tokens & code
CSS
--color: #1f42bc; /* rgb */ color: rgb(31, 66, 188); /* oklch */ color: oklch(44.1% 0.195 265.8);
Tailwind
colors: {
custom: {
50: '#7876d1',
500: '#1f42bc',
950: '#000000',
},
}SCSS
$custom: #1f42bc; $custom-light: #7876d1; $custom-dark: #000000;
JSON
{
"hex": "#1f42bc",
"rgb": {
"r": 31,
"g": 66,
"b": 188
},
"hsl": {
"h": 226.624,
"s": 71.689,
"l": 42.941
},
"oklch": {
"l": 0.44074,
"c": 0.19515,
"h": 265.8
},
"luminance": 0.07819
}Semantic roles & 50–950 ramp
primary
#1F42BC
secondary
#CDB769
accent
#C639EE
background
#F8F7FD
surface
#EFEDFA
border
#CAC8D3
text
#0B0814
muted
#7C7B83