#255D4F
Closest named color: Dark Green Blue (#1F6357). oklch(43.7% 0.064 174.2), rgb(37, 93, 79).
Aa
White text reads best on this color (7.61:1).
About this color
#255D4F is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.064 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.019 away. White text reads best on it, at 7.61:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.75:1 |
| White text | 7.61:1 |
Values
| HEX | #255D4F |
| RGB | rgb(37, 93, 79) |
| HSL | hsl(165, 43%, 25%) |
| OKLCH | oklch(43.7% 0.064 174.2) |
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 #255D4F | 7.61:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #255D4F | 2.75:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #255D4F text on white | 7.61:1 | AAA | Lc 86.3 | Fine for body text |
| #255D4F text on black | 2.75:1 | Fails | Lc -15.8 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
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
#A9C9BF
oklch(80.9% 0.037 174.5)
-
Step 400
400
#79AD9E
oklch(70.7% 0.059 174.6)
-
Step 500
500
#549986
oklch(63.2% 0.076 173.9)
-
Step 600
600
#358370
oklch(55.6% 0.082 174.5)
-
Step 700
700
#276F5E
oklch(49.2% 0.076 174.5)
-
Step 800
800 (this color)
#255D4F
oklch(43.7% 0.064 174.2)
-
Step 900
900
#224A40
oklch(37.7% 0.049 175.2)
-
Step 950
950
#152C25
oklch(27.2% 0.032 172.2)
#255D4F 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) | #5A574E | 0.067 |
| Deuteranopia (no green cones) | #515150 | 0.063 |
| Tritanopia (no blue cones) | #035E59 | 0.020 |
| Achromatopsia (no color) | #545454 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255D4F
#255D4F
oklch(43.7% 0.064 174.2)
- #6D4354
#6D4354
oklch(43.7% 0.063 354.1)
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 #255D4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.019
- Pine #2B5D34 ΔE 0.041
- Deep Teal #00555A ΔE 0.042
- Petrol #005F6A ΔE 0.044
- Spruce #0A5F38 ΔE 0.044
- Dark Blue Green #005249 ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.046
- Dark Aqua #05696B ΔE 0.049
Use #255D4F 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.