#257F87
Closest named color: Teal (#008080). oklch(54.9% 0.082 203.7), rgb(37, 127, 135).
Aa
White text reads best on this color (4.70:1).
About this color
#257F87 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 55%, its chroma 0.082 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Teal (#008080), ΔE 0.018 away. White text reads best on it, at 4.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Teal (#008080) |
| Black text | 4.46:1 |
| White text | 4.70:1 |
Values
| HEX | #257F87 |
| RGB | rgb(37, 127, 135) |
| HSL | hsl(185, 57%, 34%) |
| OKLCH | oklch(54.9% 0.082 203.7) |
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 #257F87 | 4.70:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #257F87 | 4.46:1 | AA large text | Lc 31.7 | Non-text elements, placeholder text |
| #257F87 text on white | 4.70:1 | AA | Lc 72.3 | Content text, not long reading |
| #257F87 text on black | 4.46:1 | AA large text | Lc -29.3 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADDDF
oklch(88.4% 0.021 204.4)
-
Step 300
300
#A6C8CB
oklch(80.9% 0.037 203)
-
Step 400
400
#74ACB1
oklch(70.7% 0.059 203)
-
Step 500
500
#4B979E
oklch(63.1% 0.076 203.4)
-
Step 600
600 (this color)
#257F87
oklch(54.9% 0.082 203.7)
-
Step 700
700
#186D74
oklch(49% 0.077 203.4)
-
Step 800
800
#18595F
oklch(42.7% 0.064 204)
-
Step 900
900
#1C494D
oklch(37.6% 0.049 203.3)
-
Step 950
950
#122B2D
oklch(27% 0.031 202.3)
#257F87 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) | #757A88 | 0.082 |
| Deuteranopia (no green cones) | #666F87 | 0.075 |
| Tritanopia (no blue cones) | #008481 | 0.023 |
| Achromatopsia (no color) | #747474 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257F87
#257F87
oklch(54.9% 0.082 203.7)
- #9C5D5A
#9C5D5A
oklch(54.8% 0.083 23.1)
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 #257F87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal #008080 ΔE 0.018
- Ocean #017B92 ΔE 0.027
- Deep Aqua #08787F ΔE 0.027
- Bluegreen #017A79 ΔE 0.029
- Dark Cyan #008B8B ΔE 0.035
- Teal Blue #01889F ΔE 0.039
- Deep Turquoise #017374 ΔE 0.047
- Sea Blue #047495 ΔE 0.048
Use #257F87 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.