#256CC4
Closest named color: Mid Blue (#276AB3). oklch(53.5% 0.154 256), rgb(37, 108, 196).
Aa
White text reads best on this color (5.22:1).
About this color
#256CC4 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.154 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.026 away. White text reads best on it, at 5.22:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 4.02:1 |
| White text | 5.22:1 |
Values
| HEX | #256CC4 |
| RGB | rgb(37, 108, 196) |
| HSL | hsl(213, 68%, 46%) |
| OKLCH | oklch(53.5% 0.154 256) |
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 #256CC4 | 5.22:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #256CC4 | 4.02:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #256CC4 text on white | 5.22:1 | AA | Lc 75.4 | Fine for body text |
| #256CC4 text on black | 4.02:1 | AA large text | Lc -26.3 | 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 600.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A4C3ED
oklch(80.9% 0.069 256.1)
-
Step 400
400
#72A3E5
oklch(70.8% 0.111 256.1)
-
Step 500
500
#4B8ADD
oklch(63% 0.142 256.1)
-
Step 600
600 (this color)
#256CC4
oklch(53.5% 0.154 256)
-
Step 700
700
#1E5FB0
oklch(49% 0.144 256.2)
-
Step 800
800
#1B4E8E
oklch(42.6% 0.119 256)
-
Step 900
900
#1D4271
oklch(37.8% 0.091 255.6)
-
Step 950
950
#122742
oklch(27.1% 0.057 255.5)
#256CC4 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) | #3E74C7 | 0.032 |
| Deuteranopia (no green cones) | #1966C2 | 0.019 |
| Tritanopia (no blue cones) | #00818E | 0.117 |
| Achromatopsia (no color) | #6C6C6C | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256CC4
#256CC4
oklch(53.5% 0.154 256)
- #926300
#926300
oklch(53.6% 0.112 76.4)
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 #256CC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.026
- Windows Blue #3778BF ΔE 0.040
- French Blue #436BAD ΔE 0.042
- Royal Blue #4169E1 ΔE 0.052
- Flat Blue #3C73A8 ΔE 0.055
- Nice Blue #107AB0 ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.064
- Muted Blue #3B719F ΔE 0.065
Use #256CC4 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.