#6372BE
Closest named color: Windows Blue (#3778BF). oklch(57.4% 0.118 273.7), rgb(99, 114, 190).
Aa
Black text reads best on this color (4.68:1).
About this color
#6372BE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.118 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.047 away. Black text reads best on it, at 4.68:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.118) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.68:1 |
| White text | 4.48:1 |
Values
| HEX | #6372BE |
| RGB | rgb(99, 114, 190) |
| HSL | hsl(230, 41%, 57%) |
| OKLCH | oklch(57.4% 0.118 273.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #6372BE | 4.48:1 | AA large text | Lc -76.5 | Fine for body text |
| Black text on #6372BE | 4.68:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #6372BE text on white | 4.48:1 | AA large text | Lc 71.0 | Content text, not long reading |
| #6372BE text on black | 4.68:1 | AA | Lc -30.6 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E6E9F4
oklch(93.5% 0.015 273.8)
-
Step 200
200
#D3D8ED
oklch(88.5% 0.029 275.1)
-
Step 300
300
#B5BFE4
oklch(80.9% 0.053 273.3)
-
Step 400
400
#8F9DD6
oklch(70.6% 0.085 273.4)
-
Step 500
500
#7584CB
oklch(63.1% 0.108 273.8)
-
Step 600
600 (this color)
#6372BE
oklch(57.4% 0.118 273.7)
-
Step 700
700
#4E5A9E
oklch(49% 0.109 274.1)
-
Step 800
800
#404A80
oklch(42.7% 0.09 274)
-
Step 900
900
#363E67
oklch(37.7% 0.071 274.1)
-
Step 950
950
#1F253C
oklch(27% 0.044 272.1)
#6372BE with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #557BC1 | 0.027 |
| Deuteranopia (no green cones) | #4D73BC | 0.027 |
| Tritanopia (no blue cones) | #40828F | 0.105 |
| Achromatopsia (no color) | #777777 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6372BE
#6372BE
oklch(57.4% 0.118 273.7)
- #907600
#907600
oklch(57.4% 0.118 93.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #6372BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.047
- French Blue #436BAD ΔE 0.053
- Steel Blue #4682B4 ΔE 0.057
- Cool Blue #4984B8 ΔE 0.057
- Flat Blue #3C73A8 ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.060
- Off Blue #5684AE ΔE 0.062
- Dull Blue #49759C ΔE 0.066
Use #6372BE in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.