#257E99
Closest named color: Ocean (#017B92). oklch(55.4% 0.091 222.7), rgb(37, 126, 153).
Aa
White text reads best on this color (4.64:1).
About this color
#257E99 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.091 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.019 away. White text reads best on it, at 4.64:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.52:1 |
| White text | 4.64:1 |
Values
| HEX | #257E99 |
| RGB | rgb(37, 126, 153) |
| HSL | hsl(194, 61%, 37%) |
| OKLCH | oklch(55.4% 0.091 222.7) |
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 #257E99 | 4.64:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #257E99 | 4.52:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #257E99 text on white | 4.64:1 | AA | Lc 71.9 | Content text, not long reading |
| #257E99 text on black | 4.52:1 | AA | Lc -29.8 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A5C7D4
oklch(80.9% 0.041 223)
-
Step 400
400
#72AABE
oklch(70.6% 0.065 222.4)
-
Step 500
500
#4A95AE
oklch(63.2% 0.083 222.4)
-
Step 600
600 (this color)
#257E99
oklch(55.4% 0.091 222.7)
-
Step 700
700
#166B83
oklch(49.1% 0.084 222.2)
-
Step 800
800
#17576B
oklch(42.7% 0.07 223.3)
-
Step 900
900
#1B4856
oklch(37.7% 0.054 221.6)
-
Step 950
950
#112A33
oklch(26.9% 0.035 224)
#257E99 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) | #6E7B9A | 0.072 |
| Deuteranopia (no green cones) | #5F7099 | 0.063 |
| Tritanopia (no blue cones) | #008687 | 0.044 |
| Achromatopsia (no color) | #747474 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257E99
#257E99
oklch(55.4% 0.091 222.7)
- #9F6047
#9F6047
oklch(55.4% 0.09 42.2)
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 #257E99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.019
- Cerulean #457B9D ΔE 0.026
- Teal Blue #01889F ΔE 0.029
- Sea Blue #047495 ΔE 0.034
- Stormy Blue #507B9C ΔE 0.036
- Dull Blue #49759C ΔE 0.038
- Nice Blue #107AB0 ΔE 0.042
- Metallic Blue #4F738E ΔE 0.042
Use #257E99 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.