#256391
Closest named color: Peacock Blue (#016795). oklch(48.2% 0.097 244.5), rgb(37, 99, 145).
Aa
White text reads best on this color (6.41:1).
About this color
#256391 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.097 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.017 away. White text reads best on it, at 6.41:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.27:1 |
| White text | 6.41:1 |
Values
| HEX | #256391 |
| RGB | rgb(37, 99, 145) |
| HSL | hsl(206, 59%, 36%) |
| OKLCH | oklch(48.2% 0.097 244.5) |
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 #256391 | 6.41:1 | AA | Lc -86.7 | Fine for body text |
| Black text on #256391 | 3.27:1 | AA large text | Lc 22.5 | Dividers and decoration only |
| #256391 text on white | 6.41:1 | AA | Lc 81.6 | Fine for body text |
| #256391 text on black | 3.27:1 | AA large text | Lc -20.3 | 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
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CBDBEA
oklch(88.4% 0.027 246.4)
-
Step 300
300
#A8C5DD
oklch(81% 0.046 243.3)
-
Step 400
400
#78A6CD
oklch(70.7% 0.076 244.7)
-
Step 500
500
#548FC0
oklch(63% 0.097 245.2)
-
Step 600
600
#3679AC
oklch(55.6% 0.104 244.4)
-
Step 700
700 (this color)
#256391
oklch(48.2% 0.097 244.5)
-
Step 800
800
#235378
oklch(42.7% 0.081 244.7)
-
Step 900
900
#224561
oklch(37.8% 0.063 244.7)
-
Step 950
950
#152839
oklch(26.9% 0.04 246.9)
#256391 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) | #4E6493 | 0.043 |
| Deuteranopia (no green cones) | #3F5A90 | 0.033 |
| Tritanopia (no blue cones) | #006E73 | 0.069 |
| Achromatopsia (no color) | #5F5F5F | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256391
#256391
oklch(48.2% 0.097 244.5)
- #835117
#835117
oklch(48.2% 0.097 64.8)
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 #256391, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.017
- Denim #3B638C ΔE 0.020
- Light Navy Blue #2E5A88 ΔE 0.027
- Denim Blue #3B5B92 ΔE 0.029
- Dusky Blue #475F94 ΔE 0.035
- Ocean Blue #03719C ΔE 0.041
- Dusk Blue #26538D ΔE 0.047
- YInMn Blue #415A77 ΔE 0.048
Use #256391 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.