#5191F5
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.2% 0.163 259), rgb(81, 145, 245).
Aa
Black text reads best on this color (6.71:1).
About this color
#5191F5 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.163 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.016 away. Black text reads best on it, at 6.71:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.163) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #5191F5 |
| RGB | rgb(81, 145, 245) |
| HSL | hsl(217, 89%, 64%) |
| OKLCH | oklch(66.2% 0.163 259) |
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 #5191F5 | 3.12:1 | AA large text | Lc -63.4 | Content text, not long reading |
| Black text on #5191F5 | 6.71:1 | AA | Lc 46.1 | Large or bold text, headings |
| #5191F5 text on white | 3.12:1 | AA large text | Lc 58.0 | Large or bold text, headings |
| #5191F5 text on black | 6.71:1 | AA | Lc -43.8 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF7
oklch(88.4% 0.045 259.9)
-
Step 300
300
#A2C2F5
oklch(80.9% 0.081 259.6)
-
Step 400
400
#6FA1F0
oklch(70.7% 0.128 259.2)
-
Step 500
500 (this color)
#5191F5
oklch(66.2% 0.163 259)
-
Step 600
600
#296ED9
oklch(55.5% 0.178 259.3)
-
Step 700
700
#1B5CBC
oklch(49.2% 0.165 258.9)
-
Step 800
800
#194B98
oklch(42.6% 0.137 259.2)
-
Step 900
900
#1B4079
oklch(37.8% 0.106 258.9)
-
Step 950
950
#112647
oklch(27.1% 0.067 259.1)
#5191F5 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) | #639AF9 | 0.032 |
| Deuteranopia (no green cones) | #498BF3 | 0.018 |
| Tritanopia (no blue cones) | #00A8B7 | 0.131 |
| Achromatopsia (no color) | #929292 | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5191F5
#5191F5
oklch(66.2% 0.163 259)
- #BF8700
#BF8700
oklch(66.2% 0.137 79.3)
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 #5191F5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.016
- Cornflower Blue #6495ED ΔE 0.026
- Soft Blue #6488EA ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.029
- Dodger Blue #1E90FF ΔE 0.034
- Cornflower #6A79F7 ΔE 0.063
- Lavender Blue #8B88F8 ΔE 0.068
- Perrywinkle #8F8CE7 ΔE 0.073
Use #5191F5 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.