#257A79
Closest named color: Bluegreen (#017A79). oklch(53% 0.079 193.9), rgb(37, 122, 121).
Aa
White text reads best on this color (5.07:1).
About this color
#257A79 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.079 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.012 away. White text reads best on it, at 5.07:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.13:1 |
| White text | 5.07:1 |
Values
| HEX | #257A79 |
| RGB | rgb(37, 122, 121) |
| HSL | hsl(179, 53%, 31%) |
| OKLCH | oklch(53% 0.079 193.9) |
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 #257A79 | 5.07:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #257A79 | 4.13:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #257A79 text on white | 5.07:1 | AA | Lc 74.7 | Content text, not long reading |
| #257A79 text on black | 4.13:1 | AA large text | Lc -27.0 | 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
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CBDDDD
oklch(88.4% 0.019 196.8)
-
Step 300
300
#A7C8C7
oklch(80.8% 0.035 194.2)
-
Step 400
400
#76ACAB
oklch(70.7% 0.057 194.5)
-
Step 500
500
#4F9796
oklch(63% 0.072 194.3)
-
Step 600
600 (this color)
#257A79
oklch(53% 0.079 193.9)
-
Step 700
700
#206E6D
oklch(49.2% 0.073 193.8)
-
Step 800
800
#1D5959
oklch(42.6% 0.06 195.1)
-
Step 900
900
#1F4A49
oklch(37.9% 0.048 193.3)
-
Step 950
950
#132B2B
oklch(27% 0.03 195.5)
#257A79 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) | #727479 | 0.082 |
| Deuteranopia (no green cones) | #656A7A | 0.078 |
| Tritanopia (no blue cones) | #007E79 | 0.016 |
| Achromatopsia (no color) | #6E6E6E | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257A79
#257A79
oklch(53% 0.079 193.9)
- #94585E
#94585E
oklch(53% 0.08 13.7)
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 #257A79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.012
- Deep Aqua #08787F ΔE 0.017
- Teal #008080 ΔE 0.019
- Deep Turquoise #017374 ΔE 0.028
- Dark Aquamarine #017371 ΔE 0.029
- Ocean #017B92 ΔE 0.039
- Dark Cyan #008B8B ΔE 0.050
- Sea Blue #047495 ΔE 0.054
Use #257A79 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.