#256B8F
Closest named color: Peacock Blue (#016795). oklch(50.1% 0.089 235.2), rgb(37, 107, 143).
Aa
White text reads best on this color (5.86:1).
About this color
#256B8F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.089 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.023 away. White text reads best on it, at 5.86:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.57:1 |
| White text | 5.86:1 |
Values
| HEX | #256B8F |
| RGB | rgb(37, 107, 143) |
| HSL | hsl(200, 59%, 35%) |
| OKLCH | oklch(50.1% 0.089 235.2) |
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 #256B8F | 5.86:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #256B8F | 3.57:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #256B8F text on white | 5.86:1 | AA | Lc 79.1 | Fine for body text |
| #256B8F text on black | 3.57:1 | AA large text | Lc -22.7 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE7
oklch(88.5% 0.024 236)
-
Step 300
300
#A7C6D9
oklch(81% 0.043 235)
-
Step 400
400
#76A8C6
oklch(70.7% 0.069 235.4)
-
Step 500
500
#5092B7
oklch(63.1% 0.088 235)
-
Step 600
600
#307CA3
oklch(55.7% 0.095 234.7)
-
Step 700
700 (this color)
#256B8F
oklch(50.1% 0.089 235.2)
-
Step 800
800
#1E5572
oklch(42.7% 0.074 235.5)
-
Step 900
900
#1F465C
oklch(37.6% 0.058 235.9)
-
Step 950
950
#132936
oklch(26.9% 0.037 236.3)
#256B8F 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) | #5A6A91 | 0.055 |
| Deuteranopia (no green cones) | #4B608E | 0.045 |
| Tritanopia (no blue cones) | #007477 | 0.056 |
| Achromatopsia (no color) | #656565 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256B8F
#256B8F
oklch(50.1% 0.089 235.2)
- #8A552E
#8A552E
oklch(50.1% 0.089 55.4)
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 #256B8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.023
- Ocean Blue #03719C ΔE 0.024
- Sea Blue #047495 ΔE 0.027
- Denim #3B638C ΔE 0.027
- Muted Blue #3B719F ΔE 0.036
- Dusky Blue #475F94 ΔE 0.047
- Ocean #017B92 ΔE 0.047
- Flat Blue #3C73A8 ΔE 0.049
Use #256B8F 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.