#255A4E
Closest named color: Dark Green Blue (#1F6357). oklch(42.8% 0.06 176.2), rgb(37, 90, 78).
Aa
White text reads best on this color (7.92:1).
About this color
#255A4E is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.060 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.028 away. White text reads best on it, at 7.92:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.65:1 |
| White text | 7.92:1 |
Values
| HEX | #255A4E |
| RGB | rgb(37, 90, 78) |
| HSL | hsl(166, 42%, 25%) |
| OKLCH | oklch(42.8% 0.06 176.2) |
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 #255A4E | 7.92:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #255A4E | 2.65:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #255A4E text on white | 7.92:1 | AAA | Lc 87.3 | Fine for body text |
| #255A4E text on black | 2.65:1 | Fails | Lc -14.8 | Not readable |
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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CCDED8
oklch(88.5% 0.021 173.9)
-
Step 300
300
#AAC8C0
oklch(80.8% 0.034 177.5)
-
Step 400
400
#7BAD9F
oklch(70.8% 0.057 175.3)
-
Step 500
500
#579888
oklch(63.1% 0.072 176.2)
-
Step 600
600
#398272
oklch(55.5% 0.077 176.8)
-
Step 700
700
#2A6E5F
oklch(49% 0.073 176.1)
-
Step 800
800 (this color)
#255A4E
oklch(42.8% 0.06 176.2)
-
Step 900
900
#234A41
oklch(37.7% 0.047 176.7)
-
Step 950
950
#162B26
oklch(27% 0.029 177.1)
#255A4E 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) | #57554D | 0.063 |
| Deuteranopia (no green cones) | #4F4F4F | 0.060 |
| Tritanopia (no blue cones) | #065B56 | 0.018 |
| Achromatopsia (no color) | #515151 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255A4E
#255A4E
oklch(42.8% 0.06 176.2)
- #6A4150
#6A4150
oklch(42.8% 0.061 356.5)
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 #255A4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.028
- Deep Teal #00555A ΔE 0.035
- Dark Blue Green #005249 ΔE 0.036
- Dark Slate Gray #2F4F4F ΔE 0.037
- Pine #2B5D34 ΔE 0.044
- Petrol #005F6A ΔE 0.044
- Spruce #0A5F38 ΔE 0.047
- Dark Teal #014D4E ΔE 0.052
Use #255A4E 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.