#257973
Closest named color: Bluegreen (#017A79). oklch(52.5% 0.079 188.2), rgb(37, 121, 115).
Aa
White text reads best on this color (5.17:1).
About this color
#257973 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.079 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.013 away. White text reads best on it, at 5.17:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.06:1 |
| White text | 5.17:1 |
Values
| HEX | #257973 |
| RGB | rgb(37, 121, 115) |
| HSL | hsl(176, 53%, 31%) |
| OKLCH | oklch(52.5% 0.079 188.2) |
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 #257973 | 5.17:1 | AA | Lc -80.7 | Fine for body text |
| Black text on #257973 | 4.06:1 | AA large text | Lc 28.8 | Dividers and decoration only |
| #257973 text on white | 5.17:1 | AA | Lc 75.3 | Fine for body text |
| #257973 text on black | 4.06:1 | AA large text | Lc -26.4 | 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
#A8C8C5
oklch(80.8% 0.035 189.5)
-
Step 400
400
#77ACA7
oklch(70.6% 0.056 188.6)
-
Step 500
500
#519892
oklch(63.2% 0.072 188.4)
-
Step 600
600 (this color)
#257973
oklch(52.5% 0.079 188.2)
-
Step 700
700
#226E69
oklch(49.1% 0.073 188.8)
-
Step 800
800
#1F5A55
oklch(42.8% 0.061 187.4)
-
Step 900
900
#204A46
oklch(37.8% 0.047 187.1)
-
Step 950
950
#142B29
oklch(26.9% 0.029 188.3)
#257973 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) | #727273 | 0.084 |
| Deuteranopia (no green cones) | #666974 | 0.080 |
| Tritanopia (no blue cones) | #007C77 | 0.013 |
| Achromatopsia (no color) | #6D6D6D | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257973
#257973
oklch(52.5% 0.079 188.2)
- #915761
#915761
oklch(52.5% 0.078 8.9)
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 #257973, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.013
- Deep Aqua #08787F ΔE 0.022
- Teal #008080 ΔE 0.025
- Dark Aquamarine #017371 ΔE 0.025
- Deep Turquoise #017374 ΔE 0.025
- Ocean #017B92 ΔE 0.048
- Dark Aqua #05696B ΔE 0.054
- Dark Cyan #008B8B ΔE 0.056
Use #257973 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.