#5B99EA
Closest named color: Cornflower Blue (#6495ED). oklch(67.7% 0.137 255.8), rgb(91, 153, 234).
Aa
Black text reads best on this color (7.18:1).
About this color
#5B99EA is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.137 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.015 away. Black text reads best on it, at 7.18:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.18:1 |
| White text | 2.92:1 |
Values
| HEX | #5B99EA |
| RGB | rgb(91, 153, 234) |
| HSL | hsl(214, 77%, 64%) |
| OKLCH | oklch(67.7% 0.137 255.8) |
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 #5B99EA | 2.92:1 | Fails | Lc -60.7 | Content text, not long reading |
| Black text on #5B99EA | 7.18:1 | AAA | Lc 48.7 | Large or bold text, headings |
| #5B99EA text on white | 2.92:1 | Fails | Lc 55.4 | Large or bold text, headings |
| #5B99EA text on black | 7.18:1 | AAA | Lc -46.4 | Large or bold text, headings |
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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9CC3F8
oklch(80.8% 0.086 256.2)
-
Step 400
400 (this color)
#5B99EA
oklch(67.7% 0.137 255.8)
-
Step 500
500
#3589F0
oklch(63.2% 0.174 255.6)
-
Step 600
600
#0070DE
oklch(55.7% 0.188 255.7)
-
Step 700
700
#005EBC
oklch(49.2% 0.166 255.7)
-
Step 800
800
#004C9B
oklch(42.6% 0.144 255.8)
-
Step 900
900
#0E407C
oklch(37.6% 0.114 256)
-
Step 950
950
#0B2649
oklch(27% 0.073 256.3)
#5B99EA 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) | #769EED | 0.033 |
| Deuteranopia (no green cones) | #6391E8 | 0.021 |
| Tritanopia (no blue cones) | #00ABB7 | 0.112 |
| Achromatopsia (no color) | #979797 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B99EA
#5B99EA
oklch(67.7% 0.137 255.8)
- #C78A17
#C78A17
oklch(67.8% 0.137 76.1)
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 #5B99EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.015
- Chefchaouen Blue #4895EF ΔE 0.023
- Dark Sky Blue #448EE4 ΔE 0.039
- Soft Blue #6488EA ΔE 0.045
- Dodger Blue #1E90FF ΔE 0.059
- Perrywinkle #8F8CE7 ΔE 0.065
- Periwinkle Blue #8F99FB ΔE 0.066
- Faded Blue #658CBB ΔE 0.071
Use #5B99EA 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.