#257A71
Closest named color: Bluegreen (#017A79). oklch(52.7% 0.081 185), rgb(37, 122, 113).
Aa
White text reads best on this color (5.12:1).
About this color
#257A71 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.081 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.016 away. White text reads best on it, at 5.12:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.10:1 |
| White text | 5.12:1 |
Values
| HEX | #257A71 |
| RGB | rgb(37, 122, 113) |
| HSL | hsl(174, 53%, 31%) |
| OKLCH | oklch(52.7% 0.081 185) |
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 #257A71 | 5.12:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #257A71 | 4.10:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #257A71 text on white | 5.12:1 | AA | Lc 75.0 | Fine for body text |
| #257A71 text on black | 4.10:1 | AA large text | Lc -26.7 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CBDEDB
oklch(88.6% 0.021 185.4)
-
Step 300
300
#A7C9C3
oklch(80.9% 0.037 183.5)
-
Step 400
400
#77ADA5
oklch(70.8% 0.058 184.5)
-
Step 500
500
#50988F
oklch(63% 0.074 185)
-
Step 600
600 (this color)
#257A71
oklch(52.7% 0.081 185)
-
Step 700
700
#216E66
oklch(49% 0.074 185.2)
-
Step 800
800
#1E5A53
oklch(42.7% 0.062 184.4)
-
Step 900
900
#1F4A45
oklch(37.7% 0.049 185.3)
-
Step 950
950
#142B28
oklch(26.9% 0.03 184.8)
#257A71 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) | #747371 | 0.086 |
| Deuteranopia (no green cones) | #676A72 | 0.080 |
| Tritanopia (no blue cones) | #007D77 | 0.014 |
| Achromatopsia (no color) | #6E6E6E | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257A71
#257A71
oklch(52.7% 0.081 185)
- #925765
#925765
oklch(52.8% 0.08 4.8)
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 #257A71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.016
- Teal #008080 ΔE 0.025
- Deep Aqua #08787F ΔE 0.026
- Dark Aquamarine #017371 ΔE 0.028
- Deep Turquoise #017374 ΔE 0.029
- Ocean #017B92 ΔE 0.052
- Dark Cyan #008B8B ΔE 0.055
- Dark Aqua #05696B ΔE 0.057
Use #257A71 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.