#5191E7
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.4% 0.145 256.4), rgb(81, 145, 231).
Aa
Black text reads best on this color (6.55:1).
About this color
#5191E7 is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.145 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.015 away. Black text reads best on it, at 6.55:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.55:1 |
| White text | 3.20:1 |
Values
| HEX | #5191E7 |
| RGB | rgb(81, 145, 231) |
| HSL | hsl(214, 76%, 61%) |
| OKLCH | oklch(65.4% 0.145 256.4) |
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 #5191E7 | 3.20:1 | AA large text | Lc -64.4 | Content text, not long reading |
| Black text on #5191E7 | 6.55:1 | AA | Lc 45.1 | Large or bold text, headings |
| #5191E7 text on white | 3.20:1 | AA large text | Lc 59.0 | Large or bold text, headings |
| #5191E7 text on black | 6.55:1 | AA | Lc -42.7 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C9DBF4
oklch(88.6% 0.04 256.6)
-
Step 300
300
#A3C3EF
oklch(80.9% 0.072 256.4)
-
Step 400
400
#71A3E6
oklch(70.8% 0.112 256)
-
Step 500
500 (this color)
#5191E7
oklch(65.4% 0.145 256.4)
-
Step 600
600
#2B72CD
oklch(55.6% 0.157 256.4)
-
Step 700
700
#1D5FB1
oklch(49.1% 0.146 256.3)
-
Step 800
800
#1B4E90
oklch(42.8% 0.122 256.5)
-
Step 900
900
#1C4173
oklch(37.6% 0.096 256.8)
-
Step 950
950
#112743
oklch(27.1% 0.059 255.4)
#5191E7 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) | #6B97EA | 0.033 |
| Deuteranopia (no green cones) | #5589E5 | 0.021 |
| Tritanopia (no blue cones) | #00A5B1 | 0.117 |
| Achromatopsia (no color) | #909090 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5191E7
#5191E7
oklch(65.4% 0.145 256.4)
- #BF8300
#BF8300
oklch(65.4% 0.137 76.5)
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 #5191E7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.015
- Dark Sky Blue #448EE4 ΔE 0.015
- Cornflower Blue #6495ED ΔE 0.024
- Soft Blue #6488EA ΔE 0.029
- Dodger Blue #1E90FF ΔE 0.046
- Water Blue #0E87CC ΔE 0.065
- Faded Blue #658CBB ΔE 0.066
- Cornflower #6A79F7 ΔE 0.071
Use #5191E7 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.