#257170
Closest named color: Deep Turquoise (#017374). oklch(50.3% 0.073 193.8), rgb(37, 113, 112).
Aa
White text reads best on this color (5.71:1).
About this color
#257170 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 50%, its chroma 0.073 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.013 away. White text reads best on it, at 5.71:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.67:1 |
| White text | 5.71:1 |
Values
| HEX | #257170 |
| RGB | rgb(37, 113, 112) |
| HSL | hsl(179, 51%, 29%) |
| OKLCH | oklch(50.3% 0.073 193.8) |
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 #257170 | 5.71:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #257170 | 3.67:1 | AA large text | Lc 25.7 | Dividers and decoration only |
| #257170 text on white | 5.71:1 | AA | Lc 78.3 | Fine for body text |
| #257170 text on black | 3.67:1 | AA large text | Lc -23.5 | 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
#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
#77ACAB
oklch(70.7% 0.056 194.5)
-
Step 500
500
#509796
oklch(63% 0.072 194.3)
-
Step 600
600
#2F8281
oklch(55.7% 0.079 194)
-
Step 700
700 (this color)
#257170
oklch(50.3% 0.073 193.8)
-
Step 800
800
#1E5958
oklch(42.6% 0.06 193.6)
-
Step 900
900
#1F4949
oklch(37.6% 0.047 195.3)
-
Step 950
950
#132B2B
oklch(27% 0.03 195.5)
#257170 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) | #6A6B70 | 0.077 |
| Deuteranopia (no green cones) | #5E6371 | 0.071 |
| Tritanopia (no blue cones) | #007470 | 0.015 |
| Achromatopsia (no color) | #666666 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257170
#257170
oklch(50.3% 0.073 193.8)
- #885257
#885257
oklch(50.2% 0.073 14)
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 #257170, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.013
- Dark Aquamarine #017371 ΔE 0.013
- Deep Aqua #08787F ΔE 0.027
- Bluegreen #017A79 ΔE 0.027
- Dark Aqua #05696B ΔE 0.031
- Teal #008080 ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.052
- Ocean #017B92 ΔE 0.053
Use #257170 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.