#253F9B#253F9B

#253F9B is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.7% C 0.153 H 267.1°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#253F9B
RGB	rgb(37, 63, 155)
HSL	hsl(227, 61%, 38%)
HSV	hsv(227, 76%, 61%)
CMYK	cmyk(76.1%, 59.4%, 0%, 39.2%)
CIE-LAB	lab(30.19, 24.10, -53.02)
CIE-LCH	lch(30.19, 58.24, 294.44°)
OKLab	oklab(40.73% -0.0077 -0.153)
OKLCH	oklch(40.73% 0.153 267.1)
XYZ	xyz(8.4548, 6.3140, 31.7771)
Luminance	0.0631 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#253F9B #9B8125

analogous

#257A9B #253F9B #46259B

triadic

#253F9B #9B253F #3F9B25

tetradic

#253F9B #9B257A #9B8125 #259B46

square

#253F9B #9B257A #9B8125 #259B46

split-complementary

#253F9B #9B4625 #7A9B25

monochromatic

#0D1738 #192B6A #253F9B #3153CC #617CD9

Accessibility & contrast

On white

9.28

#253F9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#253F9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #253F9B

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##253F9B	#FFFFFF	#000000	##FFFFFF
##253F9B	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9E

Deuteranopia (green-blind)

#004299

Tritanopia (blue-blind)

#005666

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #253f9b;
/* rgb */ color: rgb(37, 63, 155);
/* oklch */ color: oklch(40.7% 0.153 267.1);

Tailwind

colors: {
  custom: {
    50: '#7273b9',
    500: '#253f9b',
    950: '#000000',
  },
}

SCSS

$custom: #253f9b;
$custom-light: #7273b9;
$custom-dark: #000000;

JSON

{
  "hex": "#253f9b",
  "rgb": {
    "r": 37,
    "g": 63,
    "b": 155
  },
  "hsl": {
    "h": 226.78,
    "s": 61.458,
    "l": 37.647
  },
  "oklch": {
    "l": 0.40727,
    "c": 0.15324,
    "h": 267.1
  },
  "luminance": 0.06315
}

Semantic roles & 50–950 ramp

primary

#253F9B

secondary

#BFA95D

accent

#C143E5

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #253F9B

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

Preview Lab → · Contrast checker → · Palette generator →