#255D6D
Closest named color: Petrol (#005F6A). oklch(44.8% 0.063 219.7), rgb(37, 93, 109).
Aa
White text reads best on this color (7.32:1).
About this color
#255D6D is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.063 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.019 away. White text reads best on it, at 7.32:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.86:1 |
| White text | 7.32:1 |
Values
| HEX | #255D6D |
| RGB | rgb(37, 93, 109) |
| HSL | hsl(193, 49%, 29%) |
| OKLCH | oklch(44.8% 0.063 219.7) |
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 #255D6D | 7.32:1 | AAA | Lc -90.1 | Preferred for body text |
| Black text on #255D6D | 2.86:1 | Fails | Lc 18.8 | Dividers and decoration only |
| #255D6D text on white | 7.32:1 | AAA | Lc 85.3 | Fine for body text |
| #255D6D text on black | 2.86:1 | Fails | Lc -16.8 | 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 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
#CBDDE3
oklch(88.6% 0.021 219.7)
-
Step 300
300
#A7C7D1
oklch(80.9% 0.037 218.7)
-
Step 400
400
#76AABA
oklch(70.7% 0.06 219)
-
Step 500
500
#5094A9
oklch(63% 0.076 220.2)
-
Step 600
600
#307E94
oklch(55.5% 0.082 219.9)
-
Step 700
700
#216B7F
oklch(49.2% 0.077 219.7)
-
Step 800
800 (this color)
#255D6D
oklch(44.8% 0.063 219.7)
-
Step 900
900
#1F4854
oklch(37.8% 0.05 219.7)
-
Step 950
950
#132A31
oklch(27% 0.032 219.8)
#255D6D 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) | #535A6E | 0.053 |
| Deuteranopia (no green cones) | #49536D | 0.048 |
| Tritanopia (no blue cones) | #006262 | 0.033 |
| Achromatopsia (no color) | #565656 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255D6D
#255D6D
oklch(44.8% 0.063 219.7)
- #73483A
#73483A
oklch(44.7% 0.064 38.8)
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 #255D6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.019
- YInMn Blue #415A77 ΔE 0.037
- Dark Aqua #05696B ΔE 0.040
- Deep Teal #00555A ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.054
- Dark Slate Gray #2F4F4F ΔE 0.056
Use #255D6D 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.