#256AD6
Closest named color: Royal Blue (#4169E1). oklch(54.4% 0.18 259.5), rgb(37, 106, 214).
Aa
White text reads best on this color (5.10:1).
About this color
#256AD6 is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.180 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.029 away. White text reads best on it, at 5.10:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.11:1 |
| White text | 5.10:1 |
Values
| HEX | #256AD6 |
| RGB | rgb(37, 106, 214) |
| HSL | hsl(217, 71%, 49%) |
| OKLCH | oklch(54.4% 0.18 259.5) |
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 #256AD6 | 5.10:1 | AA | Lc -80.1 | Fine for body text |
| Black text on #256AD6 | 4.11:1 | AA large text | Lc 29.4 | Dividers and decoration only |
| #256AD6 text on white | 5.10:1 | AA | Lc 74.7 | Content text, not long reading |
| #256AD6 text on black | 4.11:1 | AA large text | Lc -27.0 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A2C2F5
oklch(80.9% 0.081 259.6)
-
Step 400
400
#6FA1F1
oklch(70.8% 0.13 259.5)
-
Step 500
500
#4887EC
oklch(63.2% 0.165 259.5)
-
Step 600
600 (this color)
#256AD6
oklch(54.4% 0.18 259.5)
-
Step 700
700
#1C5BBD
oklch(49.1% 0.167 259.5)
-
Step 800
800
#194B99
oklch(42.7% 0.138 259.4)
-
Step 900
900
#1B3F7A
oklch(37.6% 0.109 259.8)
-
Step 950
950
#112647
oklch(27.1% 0.067 259.1)
#256AD6 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) | #2376DA | 0.031 |
| Deuteranopia (no green cones) | #0066D4 | 0.019 |
| Tritanopia (no blue cones) | #008496 | 0.137 |
| Achromatopsia (no color) | #6E6E6E | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #256AD6
#256AD6
oklch(54.4% 0.18 259.5)
- #926700
#926700
oklch(54.4% 0.113 79.9)
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 #256AD6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.029
- Cerulean Blue #056EEE ΔE 0.037
- Azul #1D5DEC ΔE 0.048
- Neon Blue #4361EE ΔE 0.049
- Warm Blue #4B57DB ΔE 0.053
- Mid Blue #276AB3 ΔE 0.055
- Windows Blue #3778BF ΔE 0.058
- Bright Blue #0165FC ΔE 0.060
Use #256AD6 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.