#257181
Closest named color: Deep Aqua (#08787F). oklch(51% 0.076 214.6), rgb(37, 113, 129).
Aa
White text reads best on this color (5.58:1).
About this color
#257181 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.076 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.024 away. White text reads best on it, at 5.58:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.75:1 |
| White text | 5.58:1 |
Values
| HEX | #257181 |
| RGB | rgb(37, 113, 129) |
| HSL | hsl(190, 55%, 33%) |
| OKLCH | oklch(51% 0.076 214.6) |
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 #257181 | 5.58:1 | AA | Lc -83.0 | Fine for body text |
| Black text on #257181 | 3.75:1 | AA large text | Lc 26.4 | Dividers and decoration only |
| #257181 text on white | 5.58:1 | AA | Lc 77.7 | Fine for body text |
| #257181 text on black | 3.75:1 | AA large text | Lc -24.1 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CBDDE1
oklch(88.5% 0.02 212.6)
-
Step 300
300
#A6C7CF
oklch(80.8% 0.037 214)
-
Step 400
400
#75ABB7
oklch(70.8% 0.059 213.1)
-
Step 500
500
#4E95A6
oklch(63% 0.076 215.3)
-
Step 600
600
#2D7F91
oklch(55.5% 0.082 215.1)
-
Step 700
700 (this color)
#257181
oklch(51% 0.076 214.6)
-
Step 800
800
#1C5864
oklch(42.8% 0.063 213.5)
-
Step 900
900
#1E4852
oklch(37.6% 0.049 215.6)
-
Step 950
950
#132A30
oklch(26.9% 0.031 216.7)
#257181 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) | #666D82 | 0.069 |
| Deuteranopia (no green cones) | #596481 | 0.062 |
| Tritanopia (no blue cones) | #007776 | 0.032 |
| Achromatopsia (no color) | #686868 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257181
#257181
oklch(51% 0.076 214.6)
- #8C5548
#8C5548
oklch(50.9% 0.077 34.1)
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 #257181, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.024
- Deep Turquoise #017374 ΔE 0.029
- Sea Blue #047495 ΔE 0.031
- Dark Aquamarine #017371 ΔE 0.033
- Ocean #017B92 ΔE 0.034
- Bluegreen #017A79 ΔE 0.036
- Dark Aqua #05696B ΔE 0.044
- Ocean Blue #03719C ΔE 0.044
Use #257181 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.