#375E81
Closest named color: YInMn Blue (#415A77). oklch(46.9% 0.072 247.1), rgb(55, 94, 129).
Aa
White text reads best on this color (6.81:1).
About this color
#375E81 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.072 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.019 away. White text reads best on it, at 6.81:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 3.08:1 |
| White text | 6.81:1 |
Values
| HEX | #375E81 |
| RGB | rgb(55, 94, 129) |
| HSL | hsl(208, 40%, 36%) |
| OKLCH | oklch(46.9% 0.072 247.1) |
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 #375E81 | 6.81:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #375E81 | 3.08:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #375E81 text on white | 6.81:1 | AA | Lc 83.4 | Fine for body text |
| #375E81 text on black | 3.08:1 | AA large text | Lc -18.5 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#CFDBE6
oklch(88.6% 0.02 245.7)
-
Step 300
300
#AFC3D7
oklch(80.8% 0.036 248.3)
-
Step 400
400
#85A4C2
oklch(70.6% 0.056 247.8)
-
Step 500
500
#668EB3
oklch(63.2% 0.071 247.1)
-
Step 600
600
#4C779F
oklch(55.5% 0.079 247.7)
-
Step 700
700 (this color)
#375E81
oklch(46.9% 0.072 247.1)
-
Step 800
800
#33526E
oklch(42.7% 0.06 246.9)
-
Step 900
900
#2D4459
oklch(37.7% 0.046 246.9)
-
Step 950
950
#1B2834
oklch(27.1% 0.029 246.9)
#375E81 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) | #4F5F83 | 0.030 |
| Deuteranopia (no green cones) | #455780 | 0.025 |
| Tritanopia (no blue cones) | #00666A | 0.061 |
| Achromatopsia (no color) | #5B5B5B | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375E81
#375E81
oklch(46.9% 0.072 247.1)
- #76522B
#76522B
oklch(46.9% 0.073 66.6)
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 #375E81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.019
- Light Navy Blue #2E5A88 ΔE 0.021
- Denim #3B638C ΔE 0.022
- Denim Blue #3B5B92 ΔE 0.032
- Dusky Blue #475F94 ΔE 0.038
- Dusk #4E5481 ΔE 0.039
- Dusty Grape #545775 ΔE 0.041
- Peacock Blue #016795 ΔE 0.042
Use #375E81 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.