#5B73F7
Closest named color: Cornflower (#6A79F7). oklch(60.8% 0.198 271.5), rgb(91, 115, 247).
Aa
Black text reads best on this color (5.24:1).
About this color
#5B73F7 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.198 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.025 away. Black text reads best on it, at 5.24:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.198) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.24:1 |
| White text | 4.00:1 |
Values
| HEX | #5B73F7 |
| RGB | rgb(91, 115, 247) |
| HSL | hsl(231, 91%, 66%) |
| OKLCH | oklch(60.8% 0.198 271.5) |
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 #5B73F7 | 4.00:1 | AA large text | Lc -72.5 | Content text, not long reading |
| Black text on #5B73F7 | 5.24:1 | AA | Lc 37.1 | Non-text elements, placeholder text |
| #5B73F7 text on white | 4.00:1 | AA large text | Lc 67.0 | Content text, not long reading |
| #5B73F7 text on black | 5.24:1 | AA | Lc -34.7 | 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
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CCD8FE
oklch(88.5% 0.054 271.5)
-
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)
#5B73F7
oklch(60.8% 0.198 271.5)
-
Step 600
600
#4B5FEE
oklch(55.6% 0.214 271.4)
-
Step 700
700
#3D4DCF
oklch(49.1% 0.199 271.4)
-
Step 800
800
#3240A8
oklch(42.7% 0.166 271.5)
-
Step 900
900
#2B3885
oklch(37.7% 0.129 271.5)
-
Step 950
950
#19224E
oklch(27.1% 0.081 271.3)
#5B73F7 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) | #1286FC | 0.060 |
| Deuteranopia (no green cones) | #0078F4 | 0.056 |
| Tritanopia (no blue cones) | #0092AA | 0.166 |
| Achromatopsia (no color) | #7F7F7F | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B73F7
#5B73F7
oklch(60.8% 0.198 271.5)
- #9E7F00
#9E7F00
oklch(60.8% 0.124 91.5)
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 #5B73F7, closest first.
No curated palette has a color within ΔE 0.04 of #5B73F7.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.025
- Clear Blue #247AFD ΔE 0.045
- Medium Slate Blue #7B68EE ΔE 0.048
- Royal Blue #4169E1 ΔE 0.052
- Neon Blue #4361EE ΔE 0.056
- Soft Blue #6488EA ΔE 0.061
- Cerulean Blue #056EEE ΔE 0.064
- Dark Periwinkle #665FD1 ΔE 0.071
Use #5B73F7 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.