#5B70E4
Closest named color: Royal Blue (#4169E1). oklch(58.9% 0.176 272.2), rgb(91, 112, 228).
Aa
Black text reads best on this color (4.88:1).
About this color
#5B70E4 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.176 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.037 away. Black text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.88:1 |
| White text | 4.30:1 |
Values
| HEX | #5B70E4 |
| RGB | rgb(91, 112, 228) |
| HSL | hsl(231, 72%, 63%) |
| OKLCH | oklch(58.9% 0.176 272.2) |
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 #5B70E4 | 4.30:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #5B70E4 | 4.88:1 | AA | Lc 34.6 | Non-text elements, placeholder text |
| #5B70E4 text on white | 4.30:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #5B70E4 text on black | 4.88:1 | AA | Lc -32.2 | 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
#CFD8F7
oklch(88.5% 0.044 272.7)
-
Step 300
300
#AFBEF5
oklch(80.9% 0.08 272.7)
-
Step 400
400
#859BF0
oklch(70.8% 0.127 271.8)
-
Step 500
500
#697FEA
oklch(63.1% 0.162 272.3)
-
Step 600
600 (this color)
#5B70E4
oklch(58.9% 0.176 272.2)
-
Step 700
700
#4354BC
oklch(49.2% 0.164 272)
-
Step 800
800
#374598
oklch(42.7% 0.136 272.2)
-
Step 900
900
#2F3B79
oklch(37.7% 0.106 272.1)
-
Step 950
950
#1B2347
oklch(27% 0.068 271.8)
#5B70E4 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) | #2E80E8 | 0.051 |
| Deuteranopia (no green cones) | #0374E2 | 0.058 |
| Tritanopia (no blue cones) | #008B9F | 0.153 |
| Achromatopsia (no color) | #7A7A7A | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B70E4
#5B70E4
oklch(58.9% 0.176 272.2)
- #977A00
#977A00
oklch(59% 0.121 92.1)
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 #5B70E4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.037
- Cornflower #6A79F7 ΔE 0.041
- Dark Periwinkle #665FD1 ΔE 0.048
- Medium Slate Blue #7B68EE ΔE 0.049
- Neon Blue #4361EE ΔE 0.052
- Clear Blue #247AFD ΔE 0.058
- Light Indigo #6D5ACF ΔE 0.061
- Slate Blue #6A5ACD ΔE 0.061
Use #5B70E4 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.