#556CFB
Closest named color: Neon Blue (#4361EE). oklch(59.5% 0.213 271.4), rgb(85, 108, 251).
Aa
Black text reads best on this color (4.92:1).
About this color
#556CFB is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.213 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Neon Blue (#4361EE), ΔE 0.040 away. Black text reads best on it, at 4.92:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.213) |
| Temperature | cool |
| Nearest name | Neon Blue (#4361EE) |
| Black text | 4.92:1 |
| White text | 4.26:1 |
Values
| HEX | #556CFB |
| RGB | rgb(85, 108, 251) |
| HSL | hsl(232, 95%, 66%) |
| OKLCH | oklch(59.5% 0.213 271.4) |
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 #556CFB | 4.26:1 | AA large text | Lc -74.5 | Content text, not long reading |
| Black text on #556CFB | 4.92:1 | AA | Lc 35.1 | Non-text elements, placeholder text |
| #556CFB text on white | 4.26:1 | AA large text | Lc 69.0 | Content text, not long reading |
| #556CFB text on black | 4.92:1 | AA | Lc -32.7 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#AABDFF
oklch(80.8% 0.096 271.7)
-
Step 400
400
#7F99FF
oklch(70.8% 0.152 271.3)
-
Step 500
500 (this color)
#556CFB
oklch(59.5% 0.213 271.4)
-
Step 600
600
#495BF8
oklch(55.7% 0.232 271.4)
-
Step 700
700
#3B49D8
oklch(49.1% 0.216 271.3)
-
Step 800
800
#303DAE
oklch(42.6% 0.178 271.3)
-
Step 900
900
#29368A
oklch(37.6% 0.14 271.3)
-
Step 950
950
#182151
oklch(27.1% 0.088 271.3)
#556CFB 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) | #0082FF | 0.063 |
| Deuteranopia (no green cones) | #0073F8 | 0.051 |
| Tritanopia (no blue cones) | #008FA9 | 0.175 |
| Achromatopsia (no color) | #7A7A7A | 0.214 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556CFB
#556CFB
oklch(59.5% 0.213 271.4)
- #997B00
#997B00
oklch(59.4% 0.122 91.6)
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 #556CFB, closest first.
No curated palette has a color within ΔE 0.04 of #556CFB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Neon Blue #4361EE ΔE 0.040
- Cornflower #6A79F7 ΔE 0.044
- Clear Blue #247AFD ΔE 0.046
- Royal Blue #4169E1 ΔE 0.047
- Medium Slate Blue #7B68EE ΔE 0.054
- Cerulean Blue #056EEE ΔE 0.057
- Bright Blue #0165FC ΔE 0.061
- Warm Blue #4B57DB ΔE 0.070
Use #556CFB 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.