#5191F8
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.4% 0.167 259.5), rgb(81, 145, 248).
Aa
Black text reads best on this color (6.75:1).
About this color
#5191F8 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.167 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.020 away. Black text reads best on it, at 6.75:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.75:1 |
| White text | 3.10:1 |
Values
| HEX | #5191F8 |
| RGB | rgb(81, 145, 248) |
| HSL | hsl(217, 92%, 65%) |
| OKLCH | oklch(66.4% 0.167 259.5) |
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 #5191F8 | 3.10:1 | AA large text | Lc -63.1 | Content text, not long reading |
| Black text on #5191F8 | 6.75:1 | AA | Lc 46.3 | Large or bold text, headings |
| #5191F8 text on white | 3.10:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #5191F8 text on black | 6.75:1 | AA | Lc -44.0 | 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 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
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A2C2F6
oklch(80.9% 0.082 260)
-
Step 400
400
#6EA1F1
oklch(70.7% 0.13 259.1)
-
Step 500
500 (this color)
#5191F8
oklch(66.4% 0.167 259.5)
-
Step 600
600
#286EDB
oklch(55.7% 0.181 259.4)
-
Step 700
700
#1B5BBE
oklch(49.1% 0.169 259.5)
-
Step 800
800
#194B9A
oklch(42.8% 0.14 259.6)
-
Step 900
900
#1B3F7A
oklch(37.6% 0.109 259.8)
-
Step 950
950
#102648
oklch(27.1% 0.069 258.9)
#5191F8 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) | #619AFC | 0.030 |
| Deuteranopia (no green cones) | #458BF6 | 0.020 |
| Tritanopia (no blue cones) | #00A9B8 | 0.135 |
| Achromatopsia (no color) | #929292 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5191F8
#5191F8
oklch(66.4% 0.167 259.5)
- #BF8800
#BF8800
oklch(66.4% 0.138 79.9)
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 #5191F8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.020
- Cornflower Blue #6495ED ΔE 0.028
- Soft Blue #6488EA ΔE 0.031
- Dodger Blue #1E90FF ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.033
- Cornflower #6A79F7 ΔE 0.062
- Lavender Blue #8B88F8 ΔE 0.067
- Clear Blue #247AFD ΔE 0.073
Use #5191F8 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.