#257563
Closest named color: Dark Aquamarine (#017371). oklch(50.9% 0.082 174.9), rgb(37, 117, 99).
Aa
White text reads best on this color (5.52:1).
About this color
#257563 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.082 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aquamarine (#017371), ΔE 0.027 away. White text reads best on it, at 5.52:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Dark Aquamarine (#017371) |
| Black text | 3.80:1 |
| White text | 5.52:1 |
Values
| HEX | #257563 |
| RGB | rgb(37, 117, 99) |
| HSL | hsl(167, 52%, 30%) |
| OKLCH | oklch(50.9% 0.082 174.9) |
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 #257563 | 5.52:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #257563 | 3.80:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #257563 text on white | 5.52:1 | AA | Lc 77.3 | Fine for body text |
| #257563 text on black | 3.80:1 | AA large text | Lc -24.5 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2ECE9
oklch(93.5% 0.011 176.3)
-
Step 200
200
#CBDED8
oklch(88.5% 0.022 174.9)
-
Step 300
300
#A7C9BF
oklch(80.8% 0.039 175.5)
-
Step 400
400
#76AE9E
oklch(70.7% 0.063 174.6)
-
Step 500
500
#4E9A86
oklch(63.2% 0.082 174.3)
-
Step 600
600
#2D8470
oklch(55.6% 0.088 174.7)
-
Step 700
700 (this color)
#257563
oklch(50.9% 0.082 174.9)
-
Step 800
800
#1C5B4D
oklch(42.7% 0.068 175.3)
-
Step 900
900
#1E4B40
oklch(37.8% 0.053 174.9)
-
Step 950
950
#132C25
oklch(27% 0.034 173.4)
#257563 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) | #716D62 | 0.086 |
| Deuteranopia (no green cones) | #656564 | 0.081 |
| Tritanopia (no blue cones) | #007670 | 0.021 |
| Achromatopsia (no color) | #696969 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257563
#257563
oklch(50.9% 0.082 174.9)
- #8B5168
#8B5168
oklch(50.9% 0.083 355.2)
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 #257563, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aquamarine #017371 ΔE 0.027
- Deep Turquoise #017374 ΔE 0.031
- Bluegreen #017A79 ΔE 0.033
- Deep Aqua #08787F ΔE 0.042
- Teal #008080 ΔE 0.047
- Dark Aqua #05696B ΔE 0.048
- Dark Green Blue #1F6357 ΔE 0.057
- Ocean #017B92 ΔE 0.071
Use #257563 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.