#5B70E7
Closest named color: Royal Blue (#4169E1). oklch(59.1% 0.18 272.2), rgb(91, 112, 231).
Aa
Black text reads best on this color (4.91:1).
About this color
#5B70E7 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.180 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 4.91:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.91:1 |
| White text | 4.27:1 |
Values
| HEX | #5B70E7 |
| RGB | rgb(91, 112, 231) |
| HSL | hsl(231, 74%, 63%) |
| OKLCH | oklch(59.1% 0.18 272.2) |
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 #5B70E7 | 4.27:1 | AA large text | Lc -74.7 | Content text, not long reading |
| Black text on #5B70E7 | 4.91:1 | AA | Lc 34.9 | Non-text elements, placeholder text |
| #5B70E7 text on white | 4.27:1 | AA large text | Lc 69.2 | Content text, not long reading |
| #5B70E7 text on black | 4.91:1 | AA | Lc -32.5 | 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
#AEBEF6
oklch(80.9% 0.081 272.1)
-
Step 400
400
#859AF1
oklch(70.6% 0.13 272.4)
-
Step 500
500
#687FEC
oklch(63.1% 0.165 272)
-
Step 600
600 (this color)
#5B70E7
oklch(59.1% 0.18 272.2)
-
Step 700
700
#4353BE
oklch(49.1% 0.168 272.3)
-
Step 800
800
#37459A
oklch(42.8% 0.139 272.2)
-
Step 900
900
#2F3B7A
oklch(37.8% 0.107 272.2)
-
Step 950
950
#1B2348
oklch(27% 0.069 271.9)
#5B70E7 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) | #2A81EB | 0.054 |
| Deuteranopia (no green cones) | #0074E5 | 0.059 |
| Tritanopia (no blue cones) | #008CA1 | 0.155 |
| Achromatopsia (no color) | #7A7A7A | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B70E7
#5B70E7
oklch(59.1% 0.18 272.2)
- #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 #5B70E7, 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 0.038
- Medium Slate Blue #7B68EE ΔE 0.047
- Neon Blue #4361EE ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.051
- Clear Blue #247AFD ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.061
- Light Indigo #6D5ACF ΔE 0.063
Use #5B70E7 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.