#256B87
Closest named color: Sea Blue (#047495). oklch(49.7% 0.081 228.5), rgb(37, 107, 135).
Aa
White text reads best on this color (5.94:1).
About this color
#256B87 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 50%, its chroma 0.081 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.030 away. White text reads best on it, at 5.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #256B87 |
| RGB | rgb(37, 107, 135) |
| HSL | hsl(197, 57%, 34%) |
| OKLCH | oklch(49.7% 0.081 228.5) |
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 #256B87 | 5.94:1 | AA | Lc -84.7 | Fine for body text |
| Black text on #256B87 | 3.53:1 | AA large text | Lc 24.6 | Dividers and decoration only |
| #256B87 text on white | 5.94:1 | AA | Lc 79.5 | Fine for body text |
| #256B87 text on black | 3.53:1 | AA large text | Lc -22.4 | 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
#E2EBF0
oklch(93.5% 0.012 231.7)
-
Step 200
200
#CBDCE5
oklch(88.4% 0.022 230.6)
-
Step 300
300
#A7C6D5
oklch(80.9% 0.04 228.7)
-
Step 400
400
#77A9C0
oklch(70.8% 0.063 228.3)
-
Step 500
500
#5193B0
oklch(63.1% 0.08 228.5)
-
Step 600
600
#317D9C
oklch(55.6% 0.088 228.5)
-
Step 700
700 (this color)
#256B87
oklch(49.7% 0.081 228.5)
-
Step 800
800
#1F566C
oklch(42.7% 0.067 228.1)
-
Step 900
900
#204758
oklch(37.7% 0.053 228.9)
-
Step 950
950
#142A33
oklch(27.1% 0.033 226.5)
#256B87 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) | #5C6988 | 0.058 |
| Deuteranopia (no green cones) | #4F5F87 | 0.052 |
| Tritanopia (no blue cones) | #007374 | 0.048 |
| Achromatopsia (no color) | #646464 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256B87
#256B87
oklch(49.7% 0.081 228.5)
- #885437
#885437
oklch(49.8% 0.081 49.3)
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 #256B87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.030
- Denim #3B638C ΔE 0.032
- Peacock Blue #016795 ΔE 0.032
- Ocean Blue #03719C ΔE 0.034
- Muted Blue #3B719F ΔE 0.046
- Deep Aqua #08787F ΔE 0.046
- Ocean #017B92 ΔE 0.047
- Deep Turquoise #017374 ΔE 0.048
Use #256B87 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.