#648BCB#648BCB

#648BCB is a light, moderate blue. Relative luminance 0.255; OKLCH L 63.5% C 0.106 H 260.0°. Best body text is #000000 at 6.10:1 contrast (WCAG AA passes).

Color values

HEX	#648BCB
RGB	rgb(100, 139, 203)
HSL	hsl(217, 50%, 59%)
HSV	hsv(217, 51%, 80%)
CMYK	cmyk(50.7%, 31.5%, 0%, 20.4%)
CIE-LAB	lab(57.54, 4.48, -37.24)
CIE-LCH	lch(57.54, 37.51, 276.86°)
OKLab	oklab(63.52% -0.0185 -0.1047)
OKLCH	oklch(63.52% 0.106 260)
XYZ	xyz(25.2640, 25.4846, 60.0761)
Luminance	0.2549 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#648BCB #CBA464

analogous

#64BECB #648BCB #7164CB

triadic

#648BCB #CB648B #8BCB64

tetradic

#648BCB #CB64BE #CBA464 #64CB71

square

#648BCB #CB64BE #CBA464 #64CB71

split-complementary

#648BCB #CB7164 #BECB64

monochromatic

#2D4F87 #3D6AB5 #648BCB #92ADDA #C0D0EA

Accessibility & contrast

On white

3.44

#648BCB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.10

#648BCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #648BCB

6.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##648BCB	#FFFFFF	#000000	##000000
##648BCB	1.00	3.44	6.10	6.10
#FFFFFF	3.44	1.00	21.00	21.00
#000000	6.10	21.00	1.00	1.00
##000000	6.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7290CE

Deuteranopia (green-blind)

#6686CA

Tritanopia (blue-blind)

#3399A2

Achromatopsia (no color)

#8A8A8A

Design tokens & code

CSS

--color: #648bcb;
/* rgb */ color: rgb(100, 139, 203);
/* oklch */ color: oklch(63.5% 0.106 260.0);

Tailwind

colors: {
  custom: {
    50: '#96acdb',
    500: '#648bcb',
    950: '#000000',
  },
}

SCSS

$custom: #648bcb;
$custom-light: #96acdb;
$custom-dark: #000000;

JSON

{
  "hex": "#648bcb",
  "rgb": {
    "r": 100,
    "g": 139,
    "b": 203
  },
  "hsl": {
    "h": 217.282,
    "s": 49.758,
    "l": 59.412
  },
  "oklch": {
    "l": 0.6352,
    "c": 0.10632,
    "h": 260
  },
  "luminance": 0.25486
}

Semantic roles & 50–950 ramp

primary

#648BCB

secondary

#D9CAB1

accent

#A54FD9

background

#F9FAFD

surface

#F2F4FB

border

#CCCED4

text

#0E1015

muted

#7E7F83

Preview Lab

Preview with #648BCB

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

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