#376FBE
Closest named color: Windows Blue (#3778BF). oklch(54.4% 0.137 257.4), rgb(55, 111, 190).
Aa
White text reads best on this color (5.02:1).
About this color
#376FBE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.137 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.025 away. White text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.17:1 |
| White text | 5.02:1 |
Values
| HEX | #376FBE |
| RGB | rgb(55, 111, 190) |
| HSL | hsl(215, 55%, 48%) |
| OKLCH | oklch(54.4% 0.137 257.4) |
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 #376FBE | 5.02:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #376FBE | 4.17:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #376FBE text on white | 5.02:1 | AA | Lc 74.4 | Content text, not long reading |
| #376FBE text on black | 4.17:1 | AA large text | Lc -27.3 | Dividers and decoration only |
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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CBDAF0
oklch(88.4% 0.034 257.9)
-
Step 300
300
#A8C3E9
oklch(81% 0.061 256.9)
-
Step 400
400
#79A2DE
oklch(70.6% 0.099 257.8)
-
Step 500
500
#568AD5
oklch(63.1% 0.127 257.6)
-
Step 600
600 (this color)
#376FBE
oklch(54.4% 0.137 257.4)
-
Step 700
700
#2D60A7
oklch(49.1% 0.126 257.3)
-
Step 800
800
#264E88
oklch(42.6% 0.107 257.9)
-
Step 900
900
#24426D
oklch(37.8% 0.082 257.5)
-
Step 950
950
#152740
oklch(27.1% 0.053 256.9)
#376FBE 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) | #4A76C1 | 0.029 |
| Deuteranopia (no green cones) | #3369BC | 0.017 |
| Tritanopia (no blue cones) | #00818D | 0.107 |
| Achromatopsia (no color) | #6F6F6F | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #376FBE
#376FBE
oklch(54.4% 0.137 257.4)
- #946600
#946600
oklch(54.5% 0.114 77.8)
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 #376FBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.025
- Mid Blue #276AB3 ΔE 0.026
- French Blue #436BAD ΔE 0.028
- Flat Blue #3C73A8 ΔE 0.039
- Nice Blue #107AB0 ΔE 0.045
- Muted Blue #3B719F ΔE 0.051
- Royal Blue #4169E1 ΔE 0.059
- Dull Blue #49759C ΔE 0.062
Use #376FBE 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.