#6376BE
Closest named color: Windows Blue (#3778BF). oklch(58.3% 0.113 271.3), rgb(99, 118, 190).
Aa
Black text reads best on this color (4.86:1).
About this color
#6376BE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.113 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.046 away. Black text reads best on it, at 4.86:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.86:1 |
| White text | 4.31:1 |
Values
| HEX | #6376BE |
| RGB | rgb(99, 118, 190) |
| HSL | hsl(227, 41%, 57%) |
| OKLCH | oklch(58.3% 0.113 271.3) |
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 #6376BE | 4.31:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #6376BE | 4.86:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #6376BE text on white | 4.31:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #6376BE text on black | 4.86:1 | AA | Lc -31.9 | 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
#E6EAF4
oklch(93.7% 0.014 268.5)
-
Step 200
200
#D2D9EC
oklch(88.6% 0.027 269.6)
-
Step 300
300
#B4BFE2
oklch(80.8% 0.051 271.5)
-
Step 400
400
#8E9ED4
oklch(70.7% 0.081 271.5)
-
Step 500
500
#7385C9
oklch(63.1% 0.105 271.8)
-
Step 600
600 (this color)
#6376BE
oklch(58.3% 0.113 271.3)
-
Step 700
700
#4B5C9C
oklch(49.1% 0.105 270.9)
-
Step 800
800
#3E4B7F
oklch(42.7% 0.088 271.6)
-
Step 900
900
#353F66
oklch(37.8% 0.068 271.9)
-
Step 950
950
#1F253C
oklch(27% 0.044 272.1)
#6376BE 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) | #5B7EC1 | 0.022 |
| Deuteranopia (no green cones) | #5276BC | 0.021 |
| Tritanopia (no blue cones) | #408591 | 0.100 |
| Achromatopsia (no color) | #7A7A7A | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6376BE
#6376BE
oklch(58.3% 0.113 271.3)
- #947815
#947815
oklch(58.3% 0.113 91.3)
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 #6376BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.046
- Cool Blue #4984B8 ΔE 0.048
- Steel Blue #4682B4 ΔE 0.049
- Off Blue #5684AE ΔE 0.053
- French Blue #436BAD ΔE 0.057
- Dusty Blue #5A86AD ΔE 0.058
- Flat Blue #3C73A8 ΔE 0.059
- Faded Blue #658CBB ΔE 0.063
Use #6376BE 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.