#257488
Closest named color: Sea Blue (#047495). oklch(52.1% 0.08 218.3), rgb(37, 116, 136).
Aa
White text reads best on this color (5.34:1).
About this color
#257488 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.080 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.023 away. White text reads best on it, at 5.34:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.93:1 |
| White text | 5.34:1 |
Values
| HEX | #257488 |
| RGB | rgb(37, 116, 136) |
| HSL | hsl(192, 57%, 34%) |
| OKLCH | oklch(52.1% 0.08 218.3) |
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 #257488 | 5.34:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #257488 | 3.93:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #257488 text on white | 5.34:1 | AA | Lc 76.3 | Fine for body text |
| #257488 text on black | 3.93:1 | AA large text | Lc -25.4 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE3
oklch(88.5% 0.022 218.6)
-
Step 300
300
#A5C7D2
oklch(80.8% 0.04 219.4)
-
Step 400
400
#73AABB
oklch(70.6% 0.063 219.2)
-
Step 500
500
#4B95AA
oklch(63.1% 0.08 218.8)
-
Step 600
600
#287F95
oklch(55.5% 0.087 218.4)
-
Step 700
700 (this color)
#257488
oklch(52.1% 0.08 218.3)
-
Step 800
800
#195867
oklch(42.8% 0.066 217.1)
-
Step 900
900
#1C4854
oklch(37.6% 0.052 218.6)
-
Step 950
950
#122A31
oklch(26.9% 0.033 219.1)
#257488 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) | #677189 | 0.068 |
| Deuteranopia (no green cones) | #596788 | 0.060 |
| Tritanopia (no blue cones) | #007B7A | 0.038 |
| Achromatopsia (no color) | #6B6B6B | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257488
#257488
oklch(52.1% 0.08 218.3)
- #915846
#915846
oklch(52% 0.081 38.3)
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 #257488, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.023
- Ocean #017B92 ΔE 0.023
- Deep Aqua #08787F ΔE 0.025
- Deep Turquoise #017374 ΔE 0.037
- Ocean Blue #03719C ΔE 0.037
- Bluegreen #017A79 ΔE 0.037
- Metallic Blue #4F738E ΔE 0.040
- Dark Aquamarine #017371 ΔE 0.041
Use #257488 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.