#257568
Closest named color: Dark Aquamarine (#017371). oklch(51.1% 0.079 180.1), rgb(37, 117, 104).
Aa
White text reads best on this color (5.49:1).
About this color
#257568 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.079 and its hue 180°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.021 away. White text reads best on it, at 5.49:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.82:1 |
| White text | 5.49:1 |
Values
| HEX | #257568 |
| RGB | rgb(37, 117, 104) |
| HSL | hsl(170, 52%, 30%) |
| OKLCH | oklch(51.1% 0.079 180.1) |
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 #257568 | 5.49:1 | AA | Lc -82.5 | Fine for body text |
| Black text on #257568 | 3.82:1 | AA large text | Lc 26.9 | Dividers and decoration only |
| #257568 text on white | 5.49:1 | AA | Lc 77.1 | Fine for body text |
| #257568 text on black | 3.82:1 | AA large text | Lc -24.6 | 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 700.
-
Step 50
50
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A7C9C1
oklch(80.9% 0.038 179.4)
-
Step 400
400
#76AEA2
oklch(70.8% 0.061 179.5)
-
Step 500
500
#4E998B
oklch(63.1% 0.078 180)
-
Step 600
600
#2C8375
oklch(55.5% 0.085 180.3)
-
Step 700
700 (this color)
#257568
oklch(51.1% 0.079 180.1)
-
Step 800
800
#1C5B50
oklch(42.8% 0.066 179.2)
-
Step 900
900
#1E4A43
oklch(37.6% 0.05 181.6)
-
Step 950
950
#132C27
oklch(27.1% 0.033 179.2)
#257568 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) | #706E67 | 0.084 |
| Deuteranopia (no green cones) | #646569 | 0.080 |
| Tritanopia (no blue cones) | #007771 | 0.016 |
| Achromatopsia (no color) | #696969 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257568
#257568
oklch(51.1% 0.079 180.1)
- #8B5264
#8B5264
oklch(50.9% 0.079 360)
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 #257568, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.021
- Deep Turquoise #017374 ΔE 0.025
- Bluegreen #017A79 ΔE 0.026
- Deep Aqua #08787F ΔE 0.035
- Teal #008080 ΔE 0.041
- Dark Aqua #05696B ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.058
- Ocean #017B92 ΔE 0.063
Use #257568 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.