#25524F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.6% 0.05 189.6), rgb(37, 82, 79).
Aa
White text reads best on this color (8.75:1).
About this color
#25524F is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.050 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.013 away. White text reads best on it, at 8.75:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.39:1 |
| White text | 8.75:1 |
Values
| HEX | #25524F |
| RGB | rgb(37, 82, 79) |
| HSL | hsl(176, 38%, 23%) |
| OKLCH | oklch(40.6% 0.05 189.6) |
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 #25524F | 8.75:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #25524F | 2.39:1 | Fails | Lc 14.1 | Not readable |
| #25524F text on white | 8.75:1 | AAA | Lc 89.8 | Fine for body text |
| #25524F text on black | 2.39:1 | Fails | Lc -12.4 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEB
oklch(93.7% 0.009 188.1)
-
Step 200
200
#CEDDDB
oklch(88.6% 0.016 187.3)
-
Step 300
300
#ACC7C4
oklch(80.9% 0.029 188.4)
-
Step 400
400
#7FAAA7
oklch(70.6% 0.046 190.8)
-
Step 500
500
#5D9591
oklch(63% 0.059 190)
-
Step 600
600
#42807B
oklch(55.7% 0.065 188.6)
-
Step 700
700
#336C68
oklch(49.2% 0.06 189.3)
-
Step 800
800 (this color)
#25524F
oklch(40.6% 0.05 189.6)
-
Step 900
900
#284846
oklch(37.6% 0.038 190.5)
-
Step 950
950
#182A29
oklch(26.9% 0.024 191.4)
#25524F 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) | #4E4E4F | 0.053 |
| Deuteranopia (no green cones) | #46484F | 0.050 |
| Tritanopia (no blue cones) | #095451 | 0.017 |
| Achromatopsia (no color) | #4B4B4B | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25524F
#25524F
oklch(40.6% 0.05 189.6)
- #613E43
#613E43
oklch(40.6% 0.05 10.1)
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 #25524F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.013
- Deep Teal #00555A ΔE 0.024
- Dark Blue Green #005249 ΔE 0.025
- Dark Teal #014D4E ΔE 0.030
- Charcoal #264653 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.050
- Petrol #005F6A ΔE 0.051
- Dark Green Blue #1F6357 ΔE 0.053
Use #25524F 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.