#123F7F#123F7F

#123F7F is a dark, moderate blue. Relative luminance 0.052; OKLCH L 37.7% C 0.119 H 258.2°. Best body text is #FFFFFF at 10.28:1 contrast (WCAG AA passes).

Color values

HEX	#123F7F
RGB	rgb(18, 63, 127)
HSL	hsl(215, 75%, 28%)
HSV	hsv(215, 86%, 50%)
CMYK	cmyk(85.8%, 50.4%, 0%, 50.2%)
CIE-LAB	lab(27.34, 10.68, -40.41)
CIE-LCH	lch(27.34, 41.80, 284.80°)
OKLab	oklab(37.69% -0.0242 -0.1163)
OKLCH	oklch(37.69% 0.119 258.2)
XYZ	xyz(5.8563, 5.2152, 20.7725)
Luminance	0.0522 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#123F7F #7F5212

analogous

#12757F #123F7F #1B127F

triadic

#123F7F #7F123F #3F7F12

tetradic

#123F7F #7F1275 #7F5212 #127F1B

square

#123F7F #7F1275 #7F5212 #127F1B

split-complementary

#123F7F #7F1B12 #757F12

monochromatic

#040D1B #0A2449 #123F7F #1A5AB5 #2B76E1

Accessibility & contrast

On white

10.28

#123F7F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#123F7F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #123F7F

10.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##123F7F	#FFFFFF	#000000	##FFFFFF
##123F7F	1.00	10.28	2.04	10.28
#FFFFFF	10.28	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#194681

Deuteranopia (green-blind)

#003C7E

Tritanopia (blue-blind)

#004E59

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #123f7f;
/* rgb */ color: rgb(18, 63, 127);
/* oklch */ color: oklch(37.7% 0.119 258.2);

Tailwind

colors: {
  custom: {
    50: '#6573a5',
    500: '#123f7f',
    950: '#000000',
  },
}

SCSS

$custom: #123f7f;
$custom-light: #6573a5;
$custom-dark: #000000;

JSON

{
  "hex": "#123f7f",
  "rgb": {
    "r": 18,
    "g": 63,
    "b": 127
  },
  "hsl": {
    "h": 215.229,
    "s": 75.172,
    "l": 28.431
  },
  "oklch": {
    "l": 0.3769,
    "c": 0.11878,
    "h": 258.2
  },
  "luminance": 0.05216
}

Semantic roles & 50–950 ramp

primary

#123F7F

secondary

#B58138

accent

#A436F2

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#06080F

muted

#7A7B7F

Preview Lab

Preview with #123F7F

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

Preview Lab → · Contrast checker → · Palette generator →