#1B257E#1B257E

#1B257E is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.5% C 0.148 H 270.3°. Best body text is #FFFFFF at 13.02:1 contrast (WCAG AA passes).

Color values

HEX	#1B257E
RGB	rgb(27, 37, 126)
HSL	hsl(234, 65%, 30%)
HSV	hsv(234, 79%, 49%)
CMYK	cmyk(78.6%, 70.6%, 0%, 50.6%)
CIE-LAB	lab(20.29, 29.39, -51.25)
CIE-LCH	lch(20.29, 59.08, 299.83°)
OKLab	oklab(32.48% 0.0007 -0.1483)
OKLCH	oklch(32.48% 0.148 270.3)
XYZ	xyz(4.8782, 3.0620, 20.0685)
Luminance	0.0306 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B257E #7E741B

analogous

#1B577E #1B257E #421B7E

triadic

#1B257E #7E1B25 #257E1B

tetradic

#1B257E #7E1B57 #7E741B #1B7E42

square

#1B257E #7E1B57 #7E741B #1B7E42

split-complementary

#1B257E #7E421B #577E1B

monochromatic

#050719 #10164C #1B257E #2634B0 #3E4DD6

Accessibility & contrast

On white

13.02

#1B257E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1B257E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B257E

13.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B257E	#FFFFFF	#000000	##FFFFFF
##1B257E	1.00	13.02	1.61	13.02
#FFFFFF	13.02	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003681

Deuteranopia (green-blind)

#002C7C

Tritanopia (blue-blind)

#003D4E

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b257e;
/* rgb */ color: rgb(27, 37, 126);
/* oklch */ color: oklch(32.5% 0.148 270.3);

Tailwind

colors: {
  custom: {
    50: '#6960a4',
    500: '#1b257e',
    950: '#000000',
  },
}

SCSS

$custom: #1b257e;
$custom-light: #6960a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b257e",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 126
  },
  "hsl": {
    "h": 233.939,
    "s": 64.706,
    "l": 30
  },
  "oklch": {
    "l": 0.32479,
    "c": 0.14832,
    "h": 270.3
  },
  "luminance": 0.03063
}

Semantic roles & 50–950 ramp

primary

#1B257E

secondary

#B2A743

accent

#D740E8

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1B257E

Body copy rendered with the generated semantic roles for this colour.

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