#257587
Closest named color: Deep Aqua (#08787F). oklch(52.3% 0.08 215.9), rgb(37, 117, 135).
Aa
White text reads best on this color (5.28:1).
About this color
#257587 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.080 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.021 away. White text reads best on it, at 5.28:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.97:1 |
| White text | 5.28:1 |
Values
| HEX | #257587 |
| RGB | rgb(37, 117, 135) |
| HSL | hsl(191, 57%, 34%) |
| OKLCH | oklch(52.3% 0.08 215.9) |
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 #257587 | 5.28:1 | AA | Lc -81.3 | Fine for body text |
| Black text on #257587 | 3.97:1 | AA large text | Lc 28.1 | Dividers and decoration only |
| #257587 text on white | 5.28:1 | AA | Lc 76.0 | Fine for body text |
| #257587 text on black | 3.97:1 | AA large text | Lc -25.8 | 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 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
#CADDE2
oklch(88.5% 0.022 215.3)
-
Step 300
300
#A5C7D1
oklch(80.8% 0.039 217.5)
-
Step 400
400
#73ABB9
oklch(70.7% 0.062 215.1)
-
Step 500
500
#4B96A8
oklch(63.2% 0.079 215.5)
-
Step 600
600
#278093
oklch(55.7% 0.086 215.2)
-
Step 700
700 (this color)
#257587
oklch(52.3% 0.08 215.9)
-
Step 800
800
#185866
oklch(42.7% 0.066 215.6)
-
Step 900
900
#1C4853
oklch(37.6% 0.051 216.8)
-
Step 950
950
#122A31
oklch(26.9% 0.033 219.1)
#257587 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) | #697188 | 0.071 |
| Deuteranopia (no green cones) | #5B6787 | 0.064 |
| Tritanopia (no blue cones) | #007C7B | 0.035 |
| Achromatopsia (no color) | #6C6C6C | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257587
#257587
oklch(52.3% 0.08 215.9)
- #925949
#925949
oklch(52.4% 0.08 36.5)
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 #257587, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.021
- Ocean #017B92 ΔE 0.022
- Sea Blue #047495 ΔE 0.025
- Bluegreen #017A79 ΔE 0.034
- Deep Turquoise #017374 ΔE 0.035
- Dark Aquamarine #017371 ΔE 0.040
- Teal #008080 ΔE 0.040
- Metallic Blue #4F738E ΔE 0.040
Use #257587 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.