#376C9F
Closest named color: Muted Blue (#3B719F). oklch(51.9% 0.099 249.5), rgb(55, 108, 159).
Aa
White text reads best on this color (5.51:1).
About this color
#376C9F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.099 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Muted Blue (#3B719F), ΔE 0.016 away. White text reads best on it, at 5.51:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Muted Blue (#3B719F) |
| Black text | 3.80:1 |
| White text | 5.51:1 |
Values
| HEX | #376C9F |
| RGB | rgb(55, 108, 159) |
| HSL | hsl(209, 49%, 42%) |
| OKLCH | oklch(51.9% 0.099 249.5) |
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 #376C9F | 5.51:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #376C9F | 3.80:1 | AA large text | Lc 26.7 | Dividers and decoration only |
| #376C9F text on white | 5.51:1 | AA | Lc 77.3 | Fine for body text |
| #376C9F text on black | 3.80:1 | AA large text | Lc -24.4 | 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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEA
oklch(88.5% 0.026 248.1)
-
Step 300
300
#AAC4DF
oklch(81% 0.048 249.4)
-
Step 400
400
#7BA5CF
oklch(70.7% 0.077 249)
-
Step 500
500
#598EC2
oklch(63.1% 0.097 249.2)
-
Step 600
600
#3D77AF
oklch(55.6% 0.107 249.6)
-
Step 700
700 (this color)
#376C9F
oklch(51.9% 0.099 249.5)
-
Step 800
800
#28527A
oklch(42.8% 0.082 249.3)
-
Step 900
900
#254462
oklch(37.7% 0.064 249.1)
-
Step 950
950
#162839
oklch(27% 0.04 248.2)
#376C9F 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) | #566EA1 | 0.036 |
| Deuteranopia (no green cones) | #48649E | 0.027 |
| Tritanopia (no blue cones) | #00787E | 0.078 |
| Achromatopsia (no color) | #696969 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #376C9F
#376C9F
oklch(51.9% 0.099 249.5)
- #8D5D1D
#8D5D1D
oklch(51.9% 0.099 69.4)
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 #376C9F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Muted Blue #3B719F ΔE 0.016
- Flat Blue #3C73A8 ΔE 0.024
- French Blue #436BAD ΔE 0.027
- Ocean Blue #03719C ΔE 0.029
- Mid Blue #276AB3 ΔE 0.035
- Denim #3B638C ΔE 0.035
- Dull Blue #49759C ΔE 0.035
- Peacock Blue #016795 ΔE 0.038
Use #376C9F 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.