#257D71
Closest named color: Bluegreen (#017A79). oklch(53.5% 0.084 182.1), rgb(37, 125, 113).
Aa
White text reads best on this color (4.94:1).
About this color
#257D71 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.084 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.021 away. White text reads best on it, at 4.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.25:1 |
| White text | 4.94:1 |
Values
| HEX | #257D71 |
| RGB | rgb(37, 125, 113) |
| HSL | hsl(172, 54%, 32%) |
| OKLCH | oklch(53.5% 0.084 182.1) |
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 #257D71 | 4.94:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #257D71 | 4.25:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #257D71 text on white | 4.94:1 | AA | Lc 73.9 | Content text, not long reading |
| #257D71 text on black | 4.25:1 | AA large text | Lc -27.8 | 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
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CBDEDA
oklch(88.5% 0.021 181.8)
-
Step 300
300
#A7C9C2
oklch(80.9% 0.038 181.5)
-
Step 400
400
#76ADA3
oklch(70.6% 0.06 181.9)
-
Step 500
500
#4E998D
oklch(63.1% 0.077 182.1)
-
Step 600
600 (this color)
#257D71
oklch(53.5% 0.084 182.1)
-
Step 700
700
#1E6F64
oklch(49.1% 0.078 182)
-
Step 800
800
#1C5A52
oklch(42.6% 0.064 183.2)
-
Step 900
900
#1E4A44
oklch(37.6% 0.05 183.5)
-
Step 950
950
#132C28
oklch(27.2% 0.032 182.2)
#257D71 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) | #777671 | 0.088 |
| Deuteranopia (no green cones) | #6B6C72 | 0.085 |
| Tritanopia (no blue cones) | #007F79 | 0.014 |
| Achromatopsia (no color) | #707070 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257D71
#257D71
oklch(53.5% 0.084 182.1)
- #955869
#955869
oklch(53.5% 0.083 2.3)
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 #257D71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.021
- Teal #008080 ΔE 0.023
- Deep Aqua #08787F ΔE 0.033
- Dark Aquamarine #017371 ΔE 0.037
- Deep Turquoise #017374 ΔE 0.038
- Dark Cyan #008B8B ΔE 0.048
- Ocean #017B92 ΔE 0.055
- Dark Aqua #05696B ΔE 0.066
Use #257D71 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.