#566DFA
Closest named color: Cornflower (#6A79F7). oklch(59.7% 0.21 271.5), rgb(86, 109, 250).
Aa
Black text reads best on this color (4.96:1).
About this color
#566DFA is a medium-dark, vivid blue. In OKLCH its lightness is 60%, its chroma 0.210 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.041 away. Black text reads best on it, at 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.210) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 4.96:1 |
| White text | 4.23:1 |
Values
| HEX | #566DFA |
| RGB | rgb(86, 109, 250) |
| HSL | hsl(232, 94%, 66%) |
| OKLCH | oklch(59.7% 0.21 271.5) |
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 #566DFA | 4.23:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #566DFA | 4.96:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #566DFA text on white | 4.23:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #566DFA text on black | 4.96:1 | AA | Lc -32.9 | 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
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#AABDFF
oklch(80.8% 0.096 271.7)
-
Step 400
400
#7F98FF
oklch(70.6% 0.153 271.7)
-
Step 500
500 (this color)
#566DFA
oklch(59.7% 0.21 271.5)
-
Step 600
600
#495BF6
oklch(55.5% 0.23 271.5)
-
Step 700
700
#3C4AD6
oklch(49.2% 0.212 271.5)
-
Step 800
800
#313EAD
oklch(42.8% 0.176 271.5)
-
Step 900
900
#2A3789
oklch(37.8% 0.137 271.4)
-
Step 950
950
#182150
oklch(27% 0.087 271.3)
#566DFA 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) | #0083FF | 0.064 |
| Deuteranopia (no green cones) | #0074F7 | 0.052 |
| Tritanopia (no blue cones) | #008FA9 | 0.173 |
| Achromatopsia (no color) | #7B7B7B | 0.211 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #566DFA
#566DFA
oklch(59.7% 0.21 271.5)
- #9A7C00
#9A7C00
oklch(59.8% 0.122 91.8)
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 #566DFA, closest first.
No curated palette has a color within ΔE 0.04 of #566DFA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.041
- Neon Blue #4361EE ΔE 0.042
- Clear Blue #247AFD ΔE 0.045
- Royal Blue #4169E1 ΔE 0.046
- Medium Slate Blue #7B68EE ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.057
- Bright Blue #0165FC ΔE 0.063
- Dark Periwinkle #665FD1 ΔE 0.069
Use #566DFA 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.