#5991EA
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.9% 0.146 259.3), rgb(89, 145, 234).
Aa
Black text reads best on this color (6.66:1).
About this color
#5991EA is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.146 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.017 away. Black text reads best on it, at 6.66:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.66:1 |
| White text | 3.15:1 |
Values
| HEX | #5991EA |
| RGB | rgb(89, 145, 234) |
| HSL | hsl(217, 78%, 63%) |
| OKLCH | oklch(65.9% 0.146 259.3) |
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 #5991EA | 3.15:1 | AA large text | Lc -63.8 | Content text, not long reading |
| Black text on #5991EA | 6.66:1 | AA | Lc 45.7 | Large or bold text, headings |
| #5991EA text on white | 3.15:1 | AA large text | Lc 58.4 | Large or bold text, headings |
| #5991EA text on black | 6.66:1 | AA | Lc -43.4 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A5C2EF
oklch(80.8% 0.071 259.1)
-
Step 400
400
#75A1E7
oklch(70.6% 0.114 259.4)
-
Step 500
500 (this color)
#5991EA
oklch(65.9% 0.146 259.3)
-
Step 600
600
#3470CE
oklch(55.6% 0.158 259.2)
-
Step 700
700
#275DB3
oklch(49.1% 0.148 259.5)
-
Step 800
800
#224D91
oklch(42.8% 0.122 259.3)
-
Step 900
900
#204073
oklch(37.6% 0.095 259.4)
-
Step 950
950
#142643
oklch(27% 0.059 259.5)
#5991EA 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) | #6A98EE | 0.028 |
| Deuteranopia (no green cones) | #568BE8 | 0.017 |
| Tritanopia (no blue cones) | #00A5B2 | 0.122 |
| Achromatopsia (no color) | #919191 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5991EA
#5991EA
oklch(65.9% 0.146 259.3)
- #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 #5991EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.017
- Cornflower Blue #6495ED ΔE 0.017
- Dark Sky Blue #448EE4 ΔE 0.023
- Soft Blue #6488EA ΔE 0.025
- Dodger Blue #1E90FF ΔE 0.048
- Perrywinkle #8F8CE7 ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.067
- Cornflower #6A79F7 ΔE 0.067
Use #5991EA 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.