#375B5D
Closest named color: Petrol (#005F6A). oklch(44.5% 0.042 200.3), rgb(55, 91, 93).
Aa
White text reads best on this color (7.45:1).
About this color
#375B5D is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.042 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.036 away. White text reads best on it, at 7.45:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #375B5D |
| RGB | rgb(55, 91, 93) |
| HSL | hsl(183, 26%, 29%) |
| OKLCH | oklch(44.5% 0.042 200.3) |
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 #375B5D | 7.45:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #375B5D | 2.81:1 | Fails | Lc 18.2 | Dividers and decoration only |
| #375B5D text on white | 7.45:1 | AAA | Lc 85.8 | Fine for body text |
| #375B5D text on black | 2.81:1 | Fails | Lc -16.2 | 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 800.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#CFDCDD
oklch(88.5% 0.014 202.4)
-
Step 300
300
#AFC6C7
oklch(81% 0.025 199.9)
-
Step 400
400
#85A8AA
oklch(70.6% 0.038 200.6)
-
Step 500
500
#659395
oklch(63.1% 0.05 199.4)
-
Step 600
600
#4B7D80
oklch(55.6% 0.054 200.6)
-
Step 700
700
#3C696C
oklch(49% 0.05 201.2)
-
Step 800
800 (this color)
#375B5D
oklch(44.5% 0.042 200.3)
-
Step 900
900
#2C4748
oklch(37.7% 0.033 198.8)
-
Step 950
950
#1A2A2A
oklch(27.1% 0.021 196)
#375B5D 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) | #56585D | 0.042 |
| Deuteranopia (no green cones) | #4F535D | 0.039 |
| Tritanopia (no blue cones) | #275D5B | 0.017 |
| Achromatopsia (no color) | #555555 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #375B5D
#375B5D
oklch(44.5% 0.042 200.3)
- #694B4A
#694B4A
oklch(44.5% 0.041 21)
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 #375B5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.036
- Dark Green Blue #1F6357 ΔE 0.036
- Dark Slate Gray #2F4F4F ΔE 0.042
- Deep Teal #00555A ΔE 0.045
- Dark Aqua #05696B ΔE 0.047
- YInMn Blue #415A77 ΔE 0.048
- Slate #516572 ΔE 0.056
- Dark Blue Green #005249 ΔE 0.061
Use #375B5D 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.