#257580
Closest named color: Deep Aqua (#08787F). oklch(52% 0.077 208.2), rgb(37, 117, 128).
Aa
White text reads best on this color (5.33:1).
About this color
#257580 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.077 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.014 away. White text reads best on it, at 5.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #257580 |
| RGB | rgb(37, 117, 128) |
| HSL | hsl(187, 55%, 32%) |
| OKLCH | oklch(52% 0.077 208.2) |
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 #257580 | 5.33:1 | AA | Lc -81.6 | Fine for body text |
| Black text on #257580 | 3.93:1 | AA large text | Lc 27.8 | Dividers and decoration only |
| #257580 text on white | 5.33:1 | AA | Lc 76.3 | Fine for body text |
| #257580 text on black | 3.93:1 | AA large text | Lc -25.5 | 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
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A6C8CD
oklch(81% 0.037 207.3)
-
Step 400
400
#74ABB4
oklch(70.6% 0.059 208.8)
-
Step 500
500
#4C96A2
oklch(63% 0.076 209.2)
-
Step 600
600
#29818D
oklch(55.7% 0.083 208.1)
-
Step 700
700 (this color)
#257580
oklch(52% 0.077 208.2)
-
Step 800
800
#195961
oklch(42.8% 0.064 207.1)
-
Step 900
900
#1C494F
oklch(37.7% 0.05 207.2)
-
Step 950
950
#122B2E
oklch(27.1% 0.031 205.7)
#257580 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) | #6B7081 | 0.075 |
| Deuteranopia (no green cones) | #5D6780 | 0.067 |
| Tritanopia (no blue cones) | #007A78 | 0.026 |
| Achromatopsia (no color) | #6B6B6B | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257580
#257580
oklch(52% 0.077 208.2)
- #905750
#905750
oklch(51.9% 0.077 27.5)
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 #257580, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.014
- Bluegreen #017A79 ΔE 0.025
- Deep Turquoise #017374 ΔE 0.025
- Ocean #017B92 ΔE 0.029
- Dark Aquamarine #017371 ΔE 0.029
- Teal #008080 ΔE 0.034
- Sea Blue #047495 ΔE 0.036
- Metallic Blue #4F738E ΔE 0.047
Use #257580 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.