#257A8A
Closest named color: Ocean (#017B92). oklch(53.7% 0.082 212.9), rgb(37, 122, 138).
Aa
White text reads best on this color (4.96:1).
About this color
#257A8A is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.082 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.015 away. White text reads best on it, at 4.96:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.22:1 |
| White text | 4.96:1 |
Values
| HEX | #257A8A |
| RGB | rgb(37, 122, 138) |
| HSL | hsl(190, 58%, 34%) |
| OKLCH | oklch(53.7% 0.082 212.9) |
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 #257A8A | 4.96:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #257A8A | 4.22:1 | AA large text | Lc 30.0 | Non-text elements, placeholder text |
| #257A8A text on white | 4.96:1 | AA | Lc 74.1 | Content text, not long reading |
| #257A8A text on black | 4.22:1 | AA large text | Lc -27.6 | 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 600.
-
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
#4E96A5
oklch(63.2% 0.075 212.9)
-
Step 600
600 (this color)
#257A8A
oklch(53.7% 0.082 212.9)
-
Step 700
700
#1D6C7A
oklch(49.1% 0.076 212.2)
-
Step 800
800
#1C5863
oklch(42.7% 0.063 212.1)
-
Step 900
900
#1E4851
oklch(37.6% 0.049 213.8)
-
Step 950
950
#132A2F
oklch(26.9% 0.03 213.4)
#257A8A 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) | #6E768B | 0.075 |
| Deuteranopia (no green cones) | #606B8A | 0.069 |
| Tritanopia (no blue cones) | #00807F | 0.031 |
| Achromatopsia (no color) | #707070 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257A8A
#257A8A
oklch(53.7% 0.082 212.9)
- #975C4F
#975C4F
oklch(53.8% 0.081 33.2)
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 #257A8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.015
- Deep Aqua #08787F ΔE 0.022
- Teal #008080 ΔE 0.030
- Sea Blue #047495 ΔE 0.032
- Bluegreen #017A79 ΔE 0.032
- Metallic Blue #4F738E ΔE 0.041
- Cerulean #457B9D ΔE 0.042
- Deep Turquoise #017374 ΔE 0.042
Use #257A8A 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.