#25565B
Closest named color: Deep Teal (#00555A). oklch(42.2% 0.053 204.3), rgb(37, 86, 91).
Aa
White text reads best on this color (8.20:1).
About this color
#25565B is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.053 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.021 away. White text reads best on it, at 8.20:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.56:1 |
| White text | 8.20:1 |
Values
| HEX | #25565B |
| RGB | rgb(37, 86, 91) |
| HSL | hsl(186, 42%, 25%) |
| OKLCH | oklch(42.2% 0.053 204.3) |
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 #25565B | 8.20:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #25565B | 2.56:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #25565B text on white | 8.20:1 | AAA | Lc 88.2 | Fine for body text |
| #25565B text on black | 2.56:1 | Fails | Lc -14.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CDDDDE
oklch(88.6% 0.017 201.4)
-
Step 300
300
#AAC7CA
oklch(80.9% 0.032 204.2)
-
Step 400
400
#7CAAAF
oklch(70.7% 0.05 204.5)
-
Step 500
500
#58959B
oklch(63.1% 0.064 203.8)
-
Step 600
600
#3B7F86
oklch(55.5% 0.069 204.4)
-
Step 700
700
#2D6B72
oklch(49% 0.064 205.4)
-
Step 800
800 (this color)
#25565B
oklch(42.2% 0.053 204.3)
-
Step 900
900
#25484C
oklch(37.7% 0.041 205.1)
-
Step 950
950
#162A2C
oklch(26.9% 0.026 203.9)
#25565B 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) | #50535B | 0.053 |
| Deuteranopia (no green cones) | #474C5B | 0.049 |
| Tritanopia (no blue cones) | #005957 | 0.023 |
| Achromatopsia (no color) | #4F4F4F | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25565B
#25565B
oklch(42.2% 0.053 204.3)
- #68423F
#68423F
oklch(42.2% 0.054 24.5)
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 #25565B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.021
- Dark Slate Gray #2F4F4F ΔE 0.025
- Petrol #005F6A ΔE 0.033
- Dark Blue Green #005249 ΔE 0.040
- Dark Teal #014D4E ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.045
- Charcoal #264653 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.052
Use #25565B 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.