#257F75
Closest named color: Teal (#008080). oklch(54.2% 0.084 184.4), rgb(37, 127, 117).
Aa
White text reads best on this color (4.80:1).
About this color
#257F75 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.084 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.018 away. White text reads best on it, at 4.80:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.37:1 |
| White text | 4.80:1 |
Values
| HEX | #257F75 |
| RGB | rgb(37, 127, 117) |
| HSL | hsl(173, 55%, 32%) |
| OKLCH | oklch(54.2% 0.084 184.4) |
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 #257F75 | 4.80:1 | AA | Lc -78.5 | Fine for body text |
| Black text on #257F75 | 4.37:1 | AA large text | Lc 31.1 | Non-text elements, placeholder text |
| #257F75 text on white | 4.80:1 | AA | Lc 73.0 | Content text, not long reading |
| #257F75 text on black | 4.37:1 | AA large text | Lc -28.7 | Dividers and decoration only |
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 600.
-
Step 50
50
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CBDEDB
oklch(88.6% 0.021 185.4)
-
Step 300
300
#A6C9C3
oklch(80.9% 0.038 183.8)
-
Step 400
400
#75ADA5
oklch(70.6% 0.06 184.8)
-
Step 500
500
#4D998F
oklch(63.1% 0.077 184.3)
-
Step 600
600 (this color)
#257F75
oklch(54.2% 0.084 184.4)
-
Step 700
700
#1B6F66
oklch(49.1% 0.078 184.4)
-
Step 800
800
#1A5A53
oklch(42.6% 0.065 184.7)
-
Step 900
900
#1D4A45
oklch(37.6% 0.05 185.5)
-
Step 950
950
#122C28
oklch(27.1% 0.033 182.6)
#257F75 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) | #797875 | 0.090 |
| Deuteranopia (no green cones) | #6C6E76 | 0.085 |
| Tritanopia (no blue cones) | #00827C | 0.014 |
| Achromatopsia (no color) | #727272 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257F75
#257F75
oklch(54.2% 0.084 184.4)
- #985A69
#985A69
oklch(54.2% 0.083 4.6)
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 #257F75, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.018
- Bluegreen #017A79 ΔE 0.023
- Deep Aqua #08787F ΔE 0.033
- Dark Cyan #008B8B ΔE 0.041
- Dark Aquamarine #017371 ΔE 0.042
- Deep Turquoise #017374 ΔE 0.042
- Ocean #017B92 ΔE 0.052
- Teal Blue #01889F ΔE 0.063
Use #257F75 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.