#257478
Closest named color: Deep Aqua (#08787F). oklch(51.4% 0.075 199.9), rgb(37, 116, 120).
Aa
White text reads best on this color (5.45:1).
About this color
#257478 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 51%, its chroma 0.075 and its hue 200°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.015 away. White text reads best on it, at 5.45:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.84:1 |
| White text | 5.45:1 |
Values
| HEX | #257478 |
| RGB | rgb(37, 116, 120) |
| HSL | hsl(183, 53%, 31%) |
| OKLCH | oklch(51.4% 0.075 199.9) |
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 #257478 | 5.45:1 | AA | Lc -82.3 | Fine for body text |
| Black text on #257478 | 3.84:1 | AA large text | Lc 27.1 | Dividers and decoration only |
| #257478 text on white | 5.45:1 | AA | Lc 77.0 | Fine for body text |
| #257478 text on black | 3.84:1 | AA large text | Lc -24.8 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CBDDDE
oklch(88.4% 0.019 200.8)
-
Step 300
300
#A6C8CA
oklch(80.9% 0.036 200.9)
-
Step 400
400
#75ACAF
oklch(70.7% 0.058 200.3)
-
Step 500
500
#4D979B
oklch(63.1% 0.074 200.1)
-
Step 600
600
#2B8186
oklch(55.5% 0.08 200.6)
-
Step 700
700 (this color)
#257478
oklch(51.4% 0.075 199.9)
-
Step 800
800
#1B595C
oklch(42.7% 0.062 199.7)
-
Step 900
900
#1D494C
oklch(37.6% 0.048 201.4)
-
Step 950
950
#132B2C
oklch(27% 0.03 199.1)
#257478 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) | #6B6F78 | 0.075 |
| Deuteranopia (no green cones) | #5F6678 | 0.070 |
| Tritanopia (no blue cones) | #007875 | 0.019 |
| Achromatopsia (no color) | #696969 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257478
#257478
oklch(51.4% 0.075 199.9)
- #8D5555
#8D5555
oklch(51.3% 0.075 20)
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 #257478, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.015
- Deep Turquoise #017374 ΔE 0.016
- Dark Aquamarine #017371 ΔE 0.019
- Bluegreen #017A79 ΔE 0.020
- Teal #008080 ΔE 0.035
- Ocean #017B92 ΔE 0.040
- Dark Aqua #05696B ΔE 0.041
- Sea Blue #047495 ΔE 0.047
Use #257478 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.