#255C6F
Closest named color: Petrol (#005F6A). oklch(44.7% 0.065 224), rgb(37, 92, 111).
Aa
White text reads best on this color (7.39:1).
About this color
#255C6F is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.065 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.022 away. White text reads best on it, at 7.39:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.83:1 |
| White text | 7.39:1 |
Values
| HEX | #255C6F |
| RGB | rgb(37, 92, 111) |
| HSL | hsl(195, 50%, 29%) |
| OKLCH | oklch(44.7% 0.065 224) |
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 #255C6F | 7.39:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #255C6F | 2.83:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #255C6F text on white | 7.39:1 | AAA | Lc 85.5 | Fine for body text |
| #255C6F text on black | 2.83:1 | Fails | Lc -16.5 | 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 800.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A7C6D3
oklch(80.8% 0.038 225.1)
-
Step 400
400
#77A9BD
oklch(70.7% 0.06 224.8)
-
Step 500
500
#5094AC
oklch(63.1% 0.078 223.2)
-
Step 600
600
#317E98
oklch(55.7% 0.084 223.9)
-
Step 700
700
#226A82
oklch(49.1% 0.079 224.3)
-
Step 800
800 (this color)
#255C6F
oklch(44.7% 0.065 224)
-
Step 900
900
#204756
oklch(37.6% 0.051 225.8)
-
Step 950
950
#142A32
oklch(27.1% 0.032 223.6)
#255C6F 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) | #515A70 | 0.051 |
| Deuteranopia (no green cones) | #47526F | 0.046 |
| Tritanopia (no blue cones) | #006262 | 0.038 |
| Achromatopsia (no color) | #565656 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255C6F
#255C6F
oklch(44.7% 0.065 224)
- #734836
#734836
oklch(44.7% 0.066 43.4)
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 #255C6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.022
- YInMn Blue #415A77 ΔE 0.034
- Dark Aqua #05696B ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.046
- Deep Teal #00555A ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.049
- Dark Green Blue #1F6357 ΔE 0.052
- Denim #3B638C ΔE 0.056
Use #255C6F 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.