#257583
Closest named color: Deep Aqua (#08787F). oklch(52.1% 0.078 211.6), rgb(37, 117, 131).
Aa
White text reads best on this color (5.31:1).
About this color
#257583 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.078 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.017 away. White text reads best on it, at 5.31:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.95:1 |
| White text | 5.31:1 |
Values
| HEX | #257583 |
| RGB | rgb(37, 117, 131) |
| HSL | hsl(189, 56%, 33%) |
| OKLCH | oklch(52.1% 0.078 211.6) |
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 #257583 | 5.31:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #257583 | 3.95:1 | AA large text | Lc 27.9 | Dividers and decoration only |
| #257583 text on white | 5.31:1 | AA | Lc 76.2 | Fine for body text |
| #257583 text on black | 3.95:1 | AA large text | Lc -25.6 | 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 700.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE1
oklch(88.5% 0.021 211.8)
-
Step 300
300
#A6C8CF
oklch(81% 0.038 211.5)
-
Step 400
400
#73ABB6
oklch(70.6% 0.061 211.2)
-
Step 500
500
#4B96A4
oklch(63.1% 0.077 211.3)
-
Step 600
600
#28808F
oklch(55.5% 0.084 211.3)
-
Step 700
700 (this color)
#257583
oklch(52.1% 0.078 211.6)
-
Step 800
800
#195863
oklch(42.6% 0.064 211.6)
-
Step 900
900
#1C4951
oklch(37.8% 0.051 211)
-
Step 950
950
#122B2F
oklch(27.1% 0.032 209)
#257583 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) | #6A7184 | 0.073 |
| Deuteranopia (no green cones) | #5C6783 | 0.065 |
| Tritanopia (no blue cones) | #007B79 | 0.031 |
| Achromatopsia (no color) | #6B6B6B | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257583
#257583
oklch(52.1% 0.078 211.6)
- #91584D
#91584D
oklch(52.2% 0.078 31.6)
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 #257583, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.017
- Ocean #017B92 ΔE 0.026
- Bluegreen #017A79 ΔE 0.029
- Deep Turquoise #017374 ΔE 0.029
- Sea Blue #047495 ΔE 0.031
- Dark Aquamarine #017371 ΔE 0.034
- Teal #008080 ΔE 0.036
- Metallic Blue #4F738E ΔE 0.044
Use #257583 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.