#5F91FB
Closest named color: Cornflower Blue (#6495ED). oklch(67.2% 0.166 263.5), rgb(95, 145, 251).
Aa
Black text reads best on this color (6.92:1).
About this color
#5F91FB is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.166 and its hue 264°. 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 6.92:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.92:1 |
| White text | 3.03:1 |
Values
| HEX | #5F91FB |
| RGB | rgb(95, 145, 251) |
| HSL | hsl(221, 95%, 68%) |
| OKLCH | oklch(67.2% 0.166 263.5) |
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 #5F91FB | 3.03:1 | AA large text | Lc -62.2 | Content text, not long reading |
| Black text on #5F91FB | 6.92:1 | AA | Lc 47.2 | Large or bold text, headings |
| #5F91FB text on white | 3.03:1 | AA large text | Lc 56.8 | Large or bold text, headings |
| #5F91FB text on black | 6.92:1 | AA | Lc -45.0 | 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
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A1C1FF
oklch(81% 0.095 263.3)
-
Step 400
400 (this color)
#5F91FB
oklch(67.2% 0.166 263.5)
-
Step 500
500
#4881FF
oklch(63.2% 0.197 263.5)
-
Step 600
600
#2563F7
oklch(55.6% 0.23 263.5)
-
Step 700
700
#1950D8
oklch(49.1% 0.216 263.6)
-
Step 800
800
#1743AE
oklch(42.7% 0.177 263.6)
-
Step 900
900
#183A8A
oklch(37.7% 0.139 263.6)
-
Step 950
950
#0F2351
oklch(27.1% 0.088 263.8)
#5F91FB 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) | #609CFF | 0.029 |
| Deuteranopia (no green cones) | #498DF9 | 0.025 |
| Tritanopia (no blue cones) | #00A9BA | 0.140 |
| Achromatopsia (no color) | #949494 | 0.166 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5F91FB
#5F91FB
oklch(67.2% 0.166 263.5)
- #BE8D00
#BE8D00
oklch(67.3% 0.138 83.8)
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 #5F91FB, 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 0.030
- Soft Blue #6488EA ΔE 0.031
- Dark Sky Blue #448EE4 ΔE 0.044
- Dodger Blue #1E90FF ΔE 0.045
- Lavender Blue #8B88F8 ΔE 0.055
- Cornflower #6A79F7 ΔE 0.059
- Perrywinkle #8F8CE7 ΔE 0.063
Use #5F91FB 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.