#5F91FF
Closest named color: Cornflower Blue (#6495ED). oklch(67.4% 0.172 264), rgb(95, 145, 255).
Aa
Black text reads best on this color (6.98:1).
About this color
#5F91FF is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.172 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.031 away. Black text reads best on it, at 6.98:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.172) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.98:1 |
| White text | 3.00:1 |
Values
| HEX | #5F91FF |
| RGB | rgb(95, 145, 255) |
| HSL | hsl(221, 100%, 69%) |
| OKLCH | oklch(67.4% 0.172 264) |
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 #5F91FF | 3.00:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #5F91FF | 6.98:1 | AA | Lc 47.5 | Large or bold text, headings |
| #5F91FF text on white | 3.00:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #5F91FF text on black | 6.98:1 | AA | Lc -45.3 | Large or bold text, headings |
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
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400 (this color)
#5F91FF
oklch(67.4% 0.172 264)
-
Step 500
500
#4980FF
oklch(63% 0.198 264)
-
Step 600
600
#2561FB
oklch(55.6% 0.237 263.9)
-
Step 700
700
#194EDB
oklch(49% 0.222 263.9)
-
Step 800
800
#1742B1
oklch(42.8% 0.183 263.9)
-
Step 900
900
#18398C
oklch(37.6% 0.144 264.2)
-
Step 950
950
#0E2352
oklch(27.1% 0.09 263.4)
#5F91FF 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) | #5D9DFF | 0.031 |
| Deuteranopia (no green cones) | #448EFD | 0.027 |
| Tritanopia (no blue cones) | #00AABC | 0.143 |
| Achromatopsia (no color) | #959595 | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5F91FF
#5F91FF
oklch(67.4% 0.172 264)
- #BE8E00
#BE8E00
oklch(67.5% 0.138 84.4)
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 #5F91FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.031
- Chefchaouen Blue #4895EF ΔE 0.035
- Soft Blue #6488EA ΔE 0.035
- Dodger Blue #1E90FF ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.049
- Lavender Blue #8B88F8 ΔE 0.055
- Cornflower #6A79F7 ΔE 0.059
- Periwinkle Blue #8F99FB ΔE 0.063
Use #5F91FF 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.