#256377
Closest named color: Petrol (#005F6A). oklch(46.9% 0.07 222.8), rgb(37, 99, 119).
Aa
White text reads best on this color (6.70:1).
About this color
#256377 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 47%, its chroma 0.070 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.031 away. White text reads best on it, at 6.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.12:1 |
| White text | 6.70:1 |
Values
| HEX | #256377 |
| RGB | rgb(37, 99, 119) |
| HSL | hsl(195, 53%, 31%) |
| OKLCH | oklch(46.9% 0.07 222.8) |
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 #256377 | 6.70:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #256377 | 3.12:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #256377 text on white | 6.70:1 | AA | Lc 82.9 | Fine for body text |
| #256377 text on black | 3.12:1 | AA large text | Lc -19.1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE2
oklch(88.4% 0.019 222.2)
-
Step 300
300
#AAC6D1
oklch(80.9% 0.034 223.5)
-
Step 400
400
#7BA9B9
oklch(70.7% 0.054 221.4)
-
Step 500
500
#5893A8
oklch(63.1% 0.069 222.9)
-
Step 600
600
#3B7D93
oklch(55.6% 0.075 222.5)
-
Step 700
700 (this color)
#256377
oklch(46.9% 0.07 222.8)
-
Step 800
800
#265666
oklch(42.7% 0.058 222.6)
-
Step 900
900
#244753
oklch(37.7% 0.045 222.5)
-
Step 950
950
#162A31
oklch(27.1% 0.029 222.4)
#256377 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) | #576178 | 0.055 |
| Deuteranopia (no green cones) | #4C5877 | 0.050 |
| Tritanopia (no blue cones) | #006969 | 0.038 |
| Achromatopsia (no color) | #5C5C5C | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256377
#256377
oklch(46.9% 0.07 222.8)
- #7C4D3A
#7C4D3A
oklch(46.9% 0.071 42.7)
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 #256377, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.031
- Dark Aqua #05696B ΔE 0.035
- YInMn Blue #415A77 ΔE 0.036
- Denim #3B638C ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.045
- Peacock Blue #016795 ΔE 0.048
- Slate #516572 ΔE 0.048
- Deep Turquoise #017374 ΔE 0.052
Use #256377 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.