#256387
Closest named color: Denim (#3B638C). oklch(47.7% 0.085 238), rgb(37, 99, 135).
Aa
White text reads best on this color (6.53:1).
About this color
#256387 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.085 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.022 away. White text reads best on it, at 6.53:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.21:1 |
| White text | 6.53:1 |
Values
| HEX | #256387 |
| RGB | rgb(37, 99, 135) |
| HSL | hsl(202, 57%, 34%) |
| OKLCH | oklch(47.7% 0.085 238) |
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 #256387 | 6.53:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #256387 | 3.21:1 | AA large text | Lc 21.9 | Dividers and decoration only |
| #256387 text on white | 6.53:1 | AA | Lc 82.1 | Fine for body text |
| #256387 text on black | 3.21:1 | AA large text | Lc -19.8 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE7
oklch(88.6% 0.023 237.7)
-
Step 300
300
#A9C5D9
oklch(80.9% 0.041 239.1)
-
Step 400
400
#79A7C5
oklch(70.6% 0.066 237.5)
-
Step 500
500
#5591B7
oklch(63.1% 0.085 237.9)
-
Step 600
600
#387BA3
oklch(55.7% 0.092 237.8)
-
Step 700
700 (this color)
#256387
oklch(47.7% 0.085 238)
-
Step 800
800
#245471
oklch(42.6% 0.071 238.1)
-
Step 900
900
#23465B
oklch(37.8% 0.054 236.9)
-
Step 950
950
#152936
oklch(27% 0.036 238.5)
#256387 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) | #526389 | 0.048 |
| Deuteranopia (no green cones) | #455986 | 0.040 |
| Tritanopia (no blue cones) | #006C6F | 0.057 |
| Achromatopsia (no color) | #5D5D5D | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256387
#256387
oklch(47.7% 0.085 238)
- #804F27
#804F27
oklch(47.5% 0.086 57.8)
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 #256387, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.022
- Peacock Blue #016795 ΔE 0.025
- Light Navy Blue #2E5A88 ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.038
- Dusky Blue #475F94 ΔE 0.043
- Ocean Blue #03719C ΔE 0.046
- Sea Blue #047495 ΔE 0.050
Use #256387 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.