#25575B
Closest named color: Deep Teal (#00555A). oklch(42.4% 0.054 202.4), rgb(37, 87, 91).
Aa
White text reads best on this color (8.09:1).
About this color
#25575B is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.054 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.022 away. White text reads best on it, at 8.09:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.59:1 |
| White text | 8.09:1 |
Values
| HEX | #25575B |
| RGB | rgb(37, 87, 91) |
| HSL | hsl(184, 42%, 25%) |
| OKLCH | oklch(42.4% 0.054 202.4) |
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 #25575B | 8.09:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #25575B | 2.59:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #25575B text on white | 8.09:1 | AAA | Lc 87.9 | Fine for body text |
| #25575B text on black | 2.59:1 | Fails | Lc -14.3 | 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
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CDDDDE
oklch(88.6% 0.017 201.4)
-
Step 300
300
#AAC7C9
oklch(80.9% 0.031 201.7)
-
Step 400
400
#7BAAAE
oklch(70.6% 0.05 202.7)
-
Step 500
500
#58959A
oklch(63% 0.064 202.4)
-
Step 600
600
#3A7F85
oklch(55.5% 0.07 203)
-
Step 700
700
#2C6C71
oklch(49.2% 0.065 202.3)
-
Step 800
800 (this color)
#25575B
oklch(42.4% 0.054 202.4)
-
Step 900
900
#24484B
oklch(37.6% 0.042 202.6)
-
Step 950
950
#162A2C
oklch(26.9% 0.026 203.9)
#25575B 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) | #51535B | 0.055 |
| Deuteranopia (no green cones) | #484D5B | 0.050 |
| Tritanopia (no blue cones) | #005A58 | 0.022 |
| Achromatopsia (no color) | #505050 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25575B
#25575B
oklch(42.4% 0.054 202.4)
- #694241
#694241
oklch(42.4% 0.055 21.2)
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 #25575B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.022
- Dark Slate Gray #2F4F4F ΔE 0.027
- Petrol #005F6A ΔE 0.031
- Dark Blue Green #005249 ΔE 0.041
- Dark Green Blue #1F6357 ΔE 0.042
- Dark Teal #014D4E ΔE 0.045
- Charcoal #264653 ΔE 0.054
- Dark Aqua #05696B ΔE 0.055
Use #25575B 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.