#5591FF
Closest named color: Chefchaouen Blue (#4895EF). oklch(67% 0.175 261.4), rgb(85, 145, 255).
Aa
Black text reads best on this color (6.88:1).
About this color
#5591FF is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.175 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.030 away. Black text reads best on it, at 6.88:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.88:1 |
| White text | 3.05:1 |
Values
| HEX | #5591FF |
| RGB | rgb(85, 145, 255) |
| HSL | hsl(219, 100%, 67%) |
| OKLCH | oklch(67% 0.175 261.4) |
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 #5591FF | 3.05:1 | AA large text | Lc -62.4 | Content text, not long reading |
| Black text on #5591FF | 6.88:1 | AA | Lc 47.0 | Large or bold text, headings |
| #5591FF text on white | 3.05:1 | AA large text | Lc 57.0 | Large or bold text, headings |
| #5591FF text on black | 6.88:1 | AA | Lc -44.7 | 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 400.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFF
oklch(93.7% 0.03 260.7)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400 (this color)
#5591FF
oklch(67% 0.175 261.4)
-
Step 500
500
#3F82FF
oklch(63.1% 0.198 261.5)
-
Step 600
600
#0562FE
oklch(55.6% 0.244 261.5)
-
Step 700
700
#0052D9
oklch(49.2% 0.217 261.4)
-
Step 800
800
#0243B3
oklch(42.8% 0.187 261.4)
-
Step 900
900
#0D3A8D
oklch(37.6% 0.146 261.5)
-
Step 950
950
#0A2353
oklch(27% 0.093 261.7)
#5591FF 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) | #5C9CFF | 0.031 |
| Deuteranopia (no green cones) | #3F8CFD | 0.024 |
| Tritanopia (no blue cones) | #00AABC | 0.141 |
| Achromatopsia (no color) | #949494 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5591FF
#5591FF
oklch(67% 0.175 261.4)
- #C08B00
#C08B00
oklch(67.1% 0.138 81.4)
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 #5591FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.030
- Cornflower Blue #6495ED ΔE 0.034
- Dodger Blue #1E90FF ΔE 0.035
- Soft Blue #6488EA ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.044
- Cornflower #6A79F7 ΔE 0.060
- Lavender Blue #8B88F8 ΔE 0.063
- Periwinkle #8E82FE ΔE 0.072
Use #5591FF 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.