#1F127B#1F127B

#1F127B is a dark, vivid blue. Relative luminance 0.022; OKLCH L 29.6% C 0.163 H 275.5°. Best body text is #FFFFFF at 14.68:1 contrast (WCAG AA passes).

Color values

HEX	#1F127B
RGB	rgb(31, 18, 123)
HSL	hsl(247, 74%, 28%)
HSV	hsv(247, 85%, 48%)
CMYK	cmyk(74.8%, 85.4%, 0%, 51.8%)
CIE-LAB	lab(16.27, 39.81, -55.96)
CIE-LCH	lch(16.27, 68.68, 305.43°)
OKLab	oklab(29.6% 0.0155 -0.1618)
OKLCH	oklch(29.6% 0.163 275.5)
XYZ	xyz(4.3554, 2.1536, 18.9212)
Luminance	0.0215 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F127B #6E7B12

analogous

#12397B #1F127B #54127B

triadic

#1F127B #7B1F12 #127B1F

tetradic

#1F127B #7B1239 #6E7B12 #127B54

square

#1F127B #7B1239 #6E7B12 #127B54

split-complementary

#1F127B #7B5412 #397B12

monochromatic

#07041B #120A46 #1F127B #2C1AB0 #3F28E0

Accessibility & contrast

On white

14.68

#1F127B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#1F127B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F127B

14.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F127B	#FFFFFF	#000000	##FFFFFF
##1F127B	1.00	14.68	1.43	14.68
#FFFFFF	14.68	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002D7E

Deuteranopia (green-blind)

#002479

Tritanopia (blue-blind)

#003448

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1f127b;
/* rgb */ color: rgb(31, 18, 123);
/* oklch */ color: oklch(29.6% 0.163 275.5);

Tailwind

colors: {
  custom: {
    50: '#6c54a2',
    500: '#1f127b',
    950: '#000000',
  },
}

SCSS

$custom: #1f127b;
$custom-light: #6c54a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f127b",
  "rgb": {
    "r": 31,
    "g": 18,
    "b": 123
  },
  "hsl": {
    "h": 247.429,
    "s": 74.468,
    "l": 27.647
  },
  "oklch": {
    "l": 0.29601,
    "c": 0.16252,
    "h": 275.5
  },
  "luminance": 0.02154
}

Semantic roles & 50–950 ramp

primary

#1F127B

secondary

#A2B138

accent

#F137DA

background

#F7F5FA

surface

#EDE8F4

border

#C8C4CE

text

#08030F

muted

#7B787F

Preview Lab

Preview with #1F127B

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

Preview Lab → · Contrast checker → · Palette generator →