#255F6A
Closest named color: Petrol (#005F6A). oklch(45.2% 0.062 212.1), rgb(37, 95, 106).
Aa
White text reads best on this color (7.18:1).
About this color
#255F6A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.062 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.017 away. White text reads best on it, at 7.18:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.92:1 |
| White text | 7.18:1 |
Values
| HEX | #255F6A |
| RGB | rgb(37, 95, 106) |
| HSL | hsl(190, 48%, 28%) |
| OKLCH | oklch(45.2% 0.062 212.1) |
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 #255F6A | 7.18:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #255F6A | 2.92:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #255F6A text on white | 7.18:1 | AAA | Lc 84.7 | Fine for body text |
| #255F6A text on black | 2.92:1 | Fails | Lc -17.3 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CBDDE1
oklch(88.5% 0.02 212.6)
-
Step 300
300
#A7C7CE
oklch(80.8% 0.036 212.4)
-
Step 400
400
#76ABB6
oklch(70.8% 0.058 212)
-
Step 500
500
#4F96A4
oklch(63.2% 0.074 212)
-
Step 600
600
#2E808F
oklch(55.7% 0.081 212)
-
Step 700
700
#1F6C79
oklch(49.1% 0.075 211.2)
-
Step 800
800 (this color)
#255F6A
oklch(45.2% 0.062 212.1)
-
Step 900
900
#1F4851
oklch(37.6% 0.048 214.1)
-
Step 950
950
#132A2F
oklch(26.9% 0.03 213.4)
#255F6A 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) | #565C6B | 0.057 |
| Deuteranopia (no green cones) | #4C546A | 0.052 |
| Tritanopia (no blue cones) | #006462 | 0.029 |
| Achromatopsia (no color) | #575757 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255F6A
#255F6A
oklch(45.2% 0.062 212.1)
- #744940
#744940
oklch(45.2% 0.061 32.4)
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 #255F6A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.017
- Dark Aqua #05696B ΔE 0.033
- Dark Green Blue #1F6357 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.042
- Deep Teal #00555A ΔE 0.045
- Slate #516572 ΔE 0.056
- Dark Slate Gray #2F4F4F ΔE 0.057
- Light Navy Blue #2E5A88 ΔE 0.058
Use #255F6A 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.