#1C399B#1C399B

#1C399B is a dark, vivid blue. Relative luminance 0.055; OKLCH L 39.2% C 0.163 H 266.0°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#1C399B
RGB	rgb(28, 57, 155)
HSL	hsl(226, 69%, 36%)
HSV	hsv(226, 82%, 61%)
CMYK	cmyk(81.9%, 63.2%, 0%, 39.2%)
CIE-LAB	lab(28.22, 27.21, -56.26)
CIE-LCH	lch(28.22, 62.49, 295.81°)
OKLab	oklab(39.15% -0.0113 -0.1628)
OKLCH	oklch(39.15% 0.163 266)
XYZ	xyz(7.8563, 5.5388, 31.6590)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C399B #9B7E1C

analogous

#1C789B #1C399B #3E1C9B

triadic

#1C399B #9B1C39 #399B1C

tetradic

#1C399B #9B1C78 #9B7E1C #1C9B3E

square

#1C399B #9B1C78 #9B7E1C #1C9B3E

split-complementary

#1C399B #9B3E1C #789B1C

monochromatic

#091333 #132667 #1C399B #254CCF #5272E0

Accessibility & contrast

On white

9.96

#1C399B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1C399B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C399B

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C399B	#FFFFFF	#000000	##FFFFFF
##1C399B	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499E

Deuteranopia (green-blind)

#003D99

Tritanopia (blue-blind)

#005364

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1c399b;
/* rgb */ color: rgb(28, 57, 155);
/* oklch */ color: oklch(39.2% 0.163 266.0);

Tailwind

colors: {
  custom: {
    50: '#6f6fb9',
    500: '#1c399b',
    950: '#000000',
  },
}

SCSS

$custom: #1c399b;
$custom-light: #6f6fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1c399b",
  "rgb": {
    "r": 28,
    "g": 57,
    "b": 155
  },
  "hsl": {
    "h": 226.299,
    "s": 69.399,
    "l": 35.882
  },
  "oklch": {
    "l": 0.39154,
    "c": 0.16319,
    "h": 266
  },
  "luminance": 0.0554
}

Semantic roles & 50–950 ramp

primary

#1C399B

secondary

#C3A850

accent

#C43CEC

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1C399B

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

Preview Lab → · Contrast checker → · Palette generator →