#5591EC
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.8% 0.15 258.5), rgb(85, 145, 236).
Aa
Black text reads best on this color (6.64:1).
About this color
#5591EC is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.150 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.014 away. Black text reads best on it, at 6.64:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.64:1 |
| White text | 3.15:1 |
Values
| HEX | #5591EC |
| RGB | rgb(85, 145, 236) |
| HSL | hsl(216, 80%, 63%) |
| OKLCH | oklch(65.8% 0.15 258.5) |
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 #5591EC | 3.15:1 | AA large text | Lc -63.8 | Content text, not long reading |
| Black text on #5591EC | 6.64:1 | AA | Lc 45.6 | Large or bold text, headings |
| #5591EC text on white | 3.15:1 | AA large text | Lc 58.4 | Large or bold text, headings |
| #5591EC text on black | 6.64:1 | AA | Lc -43.3 | 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
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A4C2F0
oklch(80.8% 0.073 258.8)
-
Step 400
400
#72A2E9
oklch(70.7% 0.117 258)
-
Step 500
500 (this color)
#5591EC
oklch(65.8% 0.15 258.5)
-
Step 600
600
#2F70D1
oklch(55.6% 0.164 258.6)
-
Step 700
700
#225DB5
oklch(49.1% 0.152 258.7)
-
Step 800
800
#1E4D92
oklch(42.8% 0.125 258.4)
-
Step 900
900
#1E4175
oklch(37.9% 0.098 258.3)
-
Step 950
950
#122644
oklch(26.9% 0.062 258.3)
#5591EC 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) | #6998F0 | 0.030 |
| Deuteranopia (no green cones) | #538AEA | 0.019 |
| Tritanopia (no blue cones) | #00A6B3 | 0.124 |
| Achromatopsia (no color) | #919191 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5591EC
#5591EC
oklch(65.8% 0.15 258.5)
- #BE8600
#BE8600
oklch(65.9% 0.137 79.1)
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 #5591EC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.014
- Cornflower Blue #6495ED ΔE 0.020
- Dark Sky Blue #448EE4 ΔE 0.022
- Soft Blue #6488EA ΔE 0.026
- Dodger Blue #1E90FF ΔE 0.044
- Cornflower #6A79F7 ΔE 0.067
- Perrywinkle #8F8CE7 ΔE 0.068
- Lavender Blue #8B88F8 ΔE 0.069
Use #5591EC 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.