#5191F1
Closest named color: Chefchaouen Blue (#4895EF). oklch(66% 0.158 258.4), rgb(81, 145, 241).
Aa
Black text reads best on this color (6.67:1).
About this color
#5191F1 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.158 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.013 away. Black text reads best on it, at 6.67:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.67:1 |
| White text | 3.14:1 |
Values
| HEX | #5191F1 |
| RGB | rgb(81, 145, 241) |
| HSL | hsl(216, 85%, 63%) |
| OKLCH | oklch(66% 0.158 258.4) |
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 #5191F1 | 3.14:1 | AA large text | Lc -63.7 | Content text, not long reading |
| Black text on #5191F1 | 6.67:1 | AA | Lc 45.8 | Large or bold text, headings |
| #5191F1 text on white | 3.14:1 | AA large text | Lc 58.3 | Large or bold text, headings |
| #5191F1 text on black | 6.67:1 | AA | Lc -43.5 | 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
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C8DBF6
oklch(88.6% 0.043 257.1)
-
Step 300
300
#A2C2F3
oklch(80.8% 0.078 258.8)
-
Step 400
400
#6FA2ED
oklch(70.8% 0.123 257.9)
-
Step 500
500 (this color)
#5191F1
oklch(66% 0.158 258.4)
-
Step 600
600
#296FD5
oklch(55.5% 0.172 258.4)
-
Step 700
700
#1C5DB9
oklch(49.2% 0.159 258.3)
-
Step 800
800
#194C96
oklch(42.7% 0.133 258.4)
-
Step 900
900
#1B4077
oklch(37.6% 0.103 258.4)
-
Step 950
950
#112646
oklch(27% 0.066 258.6)
#5191F1 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) | #6599F5 | 0.031 |
| Deuteranopia (no green cones) | #4D8AEF | 0.019 |
| Tritanopia (no blue cones) | #00A7B5 | 0.128 |
| Achromatopsia (no color) | #919191 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5191F1
#5191F1
oklch(66% 0.158 258.4)
- #BF8600
#BF8600
oklch(66% 0.137 78.6)
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 #5191F1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.013
- Cornflower Blue #6495ED ΔE 0.024
- Dark Sky Blue #448EE4 ΔE 0.024
- Soft Blue #6488EA ΔE 0.028
- Dodger Blue #1E90FF ΔE 0.037
- Cornflower #6A79F7 ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.070
- Perrywinkle #8F8CE7 ΔE 0.072
Use #5191F1 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.