#375E71
Closest named color: YInMn Blue (#415A77). oklch(46.1% 0.054 230.7), rgb(55, 94, 113).
Aa
White text reads best on this color (6.99:1).
About this color
#375E71 is a medium-dark, muted blue. In OKLCH its lightness is 46%, its chroma 0.054 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.021 away. White text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 3.00:1 |
| White text | 6.99:1 |
Values
| HEX | #375E71 |
| RGB | rgb(55, 94, 113) |
| HSL | hsl(200, 35%, 33%) |
| OKLCH | oklch(46.1% 0.054 230.7) |
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 #375E71 | 6.99:1 | AA | Lc -89.1 | Fine for body text |
| Black text on #375E71 | 3.00:1 | AA large text | Lc 19.9 | Dividers and decoration only |
| #375E71 text on white | 6.99:1 | AA | Lc 84.1 | Fine for body text |
| #375E71 text on black | 3.00:1 | AA large text | Lc -17.8 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE1
oklch(88.5% 0.015 231.2)
-
Step 300
300
#B0C4CF
oklch(80.9% 0.027 231.7)
-
Step 400
400
#87A6B6
oklch(70.7% 0.041 230.5)
-
Step 500
500
#6890A4
oklch(63.1% 0.053 230.3)
-
Step 600
600
#4F7A8F
oklch(55.6% 0.058 230.2)
-
Step 700
700 (this color)
#375E71
oklch(46.1% 0.054 230.7)
-
Step 800
800
#355463
oklch(42.8% 0.044 230)
-
Step 900
900
#2E4551
oklch(37.7% 0.035 231.6)
-
Step 950
950
#1B292F
oklch(27.1% 0.022 226.4)
#375E71 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) | #555D72 | 0.039 |
| Deuteranopia (no green cones) | #4C5671 | 0.034 |
| Tritanopia (no blue cones) | #196364 | 0.039 |
| Achromatopsia (no color) | #595959 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375E71
#375E71
oklch(46.1% 0.054 230.7)
- #71503D
#71503D
oklch(46.2% 0.053 50.9)
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 #375E71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.021
- Petrol #005F6A ΔE 0.037
- Slate #516572 ΔE 0.041
- Dusty Grape #545775 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.044
- Denim #3B638C ΔE 0.044
- Dark Aqua #05696B ΔE 0.047
- Dusk #4E5481 ΔE 0.054
Use #375E71 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.