#25555B
Closest named color: Deep Teal (#00555A). oklch(41.9% 0.053 206.3), rgb(37, 85, 91).
Aa
White text reads best on this color (8.30:1).
About this color
#25555B is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.053 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.020 away. White text reads best on it, at 8.30:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.52:1 |
| White text | 8.30:1 |
Values
| HEX | #25555B |
| RGB | rgb(37, 85, 91) |
| HSL | hsl(187, 42%, 25%) |
| OKLCH | oklch(41.9% 0.053 206.3) |
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 #25555B | 8.30:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #25555B | 2.52:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #25555B text on white | 8.30:1 | AAA | Lc 88.5 | Fine for body text |
| #25555B text on black | 2.52:1 | Fails | Lc -13.7 | 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
#CDDDDF
oklch(88.6% 0.017 205.8)
-
Step 300
300
#ABC7CA
oklch(81% 0.03 204.5)
-
Step 400
400
#7CAAB0
oklch(70.7% 0.05 206.2)
-
Step 500
500
#59959C
oklch(63.2% 0.063 205.2)
-
Step 600
600
#3C7F87
oklch(55.6% 0.069 205.8)
-
Step 700
700
#2E6B73
oklch(49.1% 0.064 206.9)
-
Step 800
800 (this color)
#25555B
oklch(41.9% 0.053 206.3)
-
Step 900
900
#25484C
oklch(37.7% 0.041 205.1)
-
Step 950
950
#162A2D
oklch(26.9% 0.026 207.9)
#25555B 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) | #4E525B | 0.051 |
| Deuteranopia (no green cones) | #464B5B | 0.048 |
| Tritanopia (no blue cones) | #005857 | 0.023 |
| Achromatopsia (no color) | #4E4E4E | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25555B
#25555B
oklch(41.9% 0.053 206.3)
- #67423E
#67423E
oklch(42.1% 0.052 26.3)
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 #25555B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.020
- Dark Slate Gray #2F4F4F ΔE 0.023
- Petrol #005F6A ΔE 0.035
- Dark Blue Green #005249 ΔE 0.040
- Dark Teal #014D4E ΔE 0.041
- Charcoal #264653 ΔE 0.048
- Dark Green Blue #1F6357 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.049
Use #25555B 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.