#5B91FA
Closest named color: Cornflower Blue (#6495ED). oklch(66.9% 0.166 262.3), rgb(91, 145, 250).
Aa
Black text reads best on this color (6.87:1).
About this color
#5B91FA is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.166 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.026 away. Black text reads best on it, at 6.87:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.87:1 |
| White text | 3.05:1 |
Values
| HEX | #5B91FA |
| RGB | rgb(91, 145, 250) |
| HSL | hsl(220, 94%, 67%) |
| OKLCH | oklch(66.9% 0.166 262.3) |
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 #5B91FA | 3.05:1 | AA large text | Lc -62.5 | Content text, not long reading |
| Black text on #5B91FA | 6.87:1 | AA | Lc 46.9 | Large or bold text, headings |
| #5B91FA text on white | 3.05:1 | AA large text | Lc 57.1 | Large or bold text, headings |
| #5B91FA text on black | 6.87:1 | AA | Lc -44.7 | 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 400.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400 (this color)
#5B91FA
oklch(66.9% 0.166 262.3)
-
Step 500
500
#4382FF
oklch(63.2% 0.197 262.2)
-
Step 600
600
#1C64F7
oklch(55.6% 0.231 262.3)
-
Step 700
700
#0F51D7
oklch(49% 0.215 262.4)
-
Step 800
800
#1044AE
oklch(42.7% 0.178 262.3)
-
Step 900
900
#143B8A
oklch(37.8% 0.139 262.2)
-
Step 950
950
#0D2350
oklch(26.9% 0.087 262.5)
#5B91FA 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) | #609BFE | 0.027 |
| Deuteranopia (no green cones) | #488DF8 | 0.022 |
| Tritanopia (no blue cones) | #00A9B9 | 0.139 |
| Achromatopsia (no color) | #939393 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B91FA
#5B91FA
oklch(66.9% 0.166 262.3)
- #BE8B00
#BE8B00
oklch(66.9% 0.138 82.4)
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 #5B91FA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.026
- Chefchaouen Blue #4895EF ΔE 0.027
- Soft Blue #6488EA ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.041
- Dodger Blue #1E90FF ΔE 0.041
- Lavender Blue #8B88F8 ΔE 0.058
- Cornflower #6A79F7 ΔE 0.059
- Perrywinkle #8F8CE7 ΔE 0.066
Use #5B91FA 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.