#25525B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.1% 0.051 212.4), rgb(37, 82, 91).
Aa
White text reads best on this color (8.61:1).
About this color
#25525B is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.051 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.020 away. White text reads best on it, at 8.61:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.43:1 |
| White text | 8.61:1 |
Values
| HEX | #25525B |
| RGB | rgb(37, 82, 91) |
| HSL | hsl(190, 42%, 25%) |
| OKLCH | oklch(41.1% 0.051 212.4) |
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 #25525B | 8.61:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #25525B | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #25525B text on white | 8.61:1 | AAA | Lc 89.4 | Fine for body text |
| #25525B text on black | 2.43:1 | Fails | Lc -12.8 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CDDCE0
oklch(88.4% 0.017 215.5)
-
Step 300
300
#ABC6CC
oklch(80.8% 0.03 212.6)
-
Step 400
400
#7EA9B2
oklch(70.7% 0.048 212)
-
Step 500
500
#5C949F
oklch(63.2% 0.061 211.4)
-
Step 600
600
#407E8A
oklch(55.7% 0.066 211.7)
-
Step 700
700
#316A75
oklch(49.1% 0.062 211.9)
-
Step 800
800 (this color)
#25525B
oklch(41.1% 0.051 212.4)
-
Step 900
900
#27474E
oklch(37.6% 0.04 213.3)
-
Step 950
950
#172A2E
oklch(27.1% 0.026 212.5)
#25525B 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) | #4B4F5C | 0.048 |
| Deuteranopia (no green cones) | #43495B | 0.044 |
| Tritanopia (no blue cones) | #005655 | 0.027 |
| Achromatopsia (no color) | #4C4C4C | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25525B
#25525B
oklch(41.1% 0.051 212.4)
- #644039
#644039
oklch(41.1% 0.052 31.5)
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 #25525B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.020
- Deep Teal #00555A ΔE 0.021
- Dark Teal #014D4E ΔE 0.036
- Charcoal #264653 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.039
- Dark Blue Green #005249 ΔE 0.040
- Petrol #005F6A ΔE 0.042
- Dark Green Blue #1F6357 ΔE 0.058
Use #25525B 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.