#257778
Closest named color: Deep Aqua (#08787F). oklch(52.2% 0.077 196.2), rgb(37, 119, 120).
Aa
White text reads best on this color (5.26:1).
About this color
#257778 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.077 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Aqua (#08787F), ΔE 0.013 away. White text reads best on it, at 5.26:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Deep Aqua (#08787F) |
| Black text | 3.98:1 |
| White text | 5.26:1 |
Values
| HEX | #257778 |
| RGB | rgb(37, 119, 120) |
| HSL | hsl(181, 53%, 31%) |
| OKLCH | oklch(52.2% 0.077 196.2) |
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 #257778 | 5.26:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #257778 | 3.98:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #257778 text on white | 5.26:1 | AA | Lc 75.9 | Fine for body text |
| #257778 text on black | 3.98:1 | AA large text | Lc -25.9 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CADEDD
oklch(88.5% 0.021 193.1)
-
Step 300
300
#A6C8C8
oklch(80.8% 0.036 196.5)
-
Step 400
400
#74ACAD
oklch(70.6% 0.059 197.3)
-
Step 500
500
#4B9899
oklch(63.2% 0.076 196.5)
-
Step 600
600
#288283
oklch(55.6% 0.082 196.1)
-
Step 700
700 (this color)
#257778
oklch(52.2% 0.077 196.2)
-
Step 800
800
#185A5A
oklch(42.8% 0.064 195)
-
Step 900
900
#1C4A4A
oklch(37.8% 0.05 195.3)
-
Step 950
950
#122B2B
oklch(26.9% 0.031 195.5)
#257778 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) | #6F7178 | 0.080 |
| Deuteranopia (no green cones) | #626879 | 0.074 |
| Tritanopia (no blue cones) | #007B77 | 0.017 |
| Achromatopsia (no color) | #6C6C6C | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257778
#257778
oklch(52.2% 0.077 196.2)
- #90575A
#90575A
oklch(52.2% 0.076 16.6)
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 #257778, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Aqua #08787F ΔE 0.013
- Bluegreen #017A79 ΔE 0.014
- Deep Turquoise #017374 ΔE 0.020
- Dark Aquamarine #017371 ΔE 0.022
- Teal #008080 ΔE 0.027
- Ocean #017B92 ΔE 0.040
- Dark Aqua #05696B ΔE 0.049
- Sea Blue #047495 ΔE 0.051
Use #257778 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.