#556BE2
Closest named color: Royal Blue (#4169E1). oklch(57.5% 0.181 271.6), rgb(85, 107, 226).
Aa
Black text reads best on this color (4.58:1).
About this color
#556BE2 is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.181 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.024 away. Black text reads best on it, at 4.58:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.58:1 |
| White text | 4.57:1 |
Values
| HEX | #556BE2 |
| RGB | rgb(85, 107, 226) |
| HSL | hsl(231, 71%, 61%) |
| OKLCH | oklch(57.5% 0.181 271.6) |
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 #556BE2 | 4.57:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #556BE2 | 4.58:1 | AA | Lc 32.6 | Non-text elements, placeholder text |
| #556BE2 text on white | 4.57:1 | AA | Lc 71.4 | Content text, not long reading |
| #556BE2 text on black | 4.58:1 | AA | Lc -30.2 | 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 600.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F8
oklch(88.5% 0.045 271.7)
-
Step 300
300
#ADBEF6
oklch(80.8% 0.082 271.4)
-
Step 400
400
#849AF2
oklch(70.6% 0.131 272)
-
Step 500
500
#677FED
oklch(63.2% 0.166 271.6)
-
Step 600
600 (this color)
#556BE2
oklch(57.5% 0.181 271.6)
-
Step 700
700
#4153BF
oklch(49.1% 0.17 271.5)
-
Step 800
800
#36459A
oklch(42.8% 0.139 271.7)
-
Step 900
900
#2E3B7B
oklch(37.8% 0.109 271.6)
-
Step 950
950
#1B2348
oklch(27% 0.069 271.9)
#556BE2 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) | #1E7CE6 | 0.054 |
| Deuteranopia (no green cones) | #006FE0 | 0.054 |
| Tritanopia (no blue cones) | #00879C | 0.154 |
| Achromatopsia (no color) | #757575 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #556BE2
#556BE2
oklch(57.5% 0.181 271.6)
- #927500
#927500
oklch(57.4% 0.117 91.4)
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 #556BE2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.024
- Neon Blue #4361EE ΔE 0.039
- Dark Periwinkle #665FD1 ΔE 0.041
- Warm Blue #4B57DB ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.054
- Light Indigo #6D5ACF ΔE 0.054
- Cerulean Blue #056EEE ΔE 0.054
- Cornflower #6A79F7 ΔE 0.055
Use #556BE2 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.