#5B9BEB
Closest named color: Cornflower Blue (#6495ED). oklch(68.2% 0.136 254.9), rgb(91, 155, 235).
Aa
Black text reads best on this color (7.33:1).
About this color
#5B9BEB is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.136 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.018 away. Black text reads best on it, at 7.33:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.33:1 |
| White text | 2.86:1 |
Values
| HEX | #5B9BEB |
| RGB | rgb(91, 155, 235) |
| HSL | hsl(213, 78%, 64%) |
| OKLCH | oklch(68.2% 0.136 254.9) |
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 #5B9BEB | 2.86:1 | Fails | Lc -59.9 | Large or bold text, headings |
| Black text on #5B9BEB | 7.33:1 | AAA | Lc 49.5 | Large or bold text, headings |
| #5B9BEB text on white | 2.86:1 | Fails | Lc 54.6 | Large or bold text, headings |
| #5B9BEB text on black | 7.33:1 | AAA | Lc -47.2 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
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
#9CC4F7
oklch(81% 0.084 254.7)
-
Step 400
400 (this color)
#5B9BEB
oklch(68.2% 0.136 254.9)
-
Step 500
500
#3189EF
oklch(63% 0.174 254.8)
-
Step 600
600
#0071DA
oklch(55.6% 0.182 254.8)
-
Step 700
700
#005FB9
oklch(49.2% 0.161 254.8)
-
Step 800
800
#004D99
oklch(42.7% 0.14 255)
-
Step 900
900
#0B417C
oklch(37.8% 0.114 254.8)
-
Step 950
950
#0A2648
oklch(26.9% 0.072 255.3)
#5B9BEB 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) | #79A0EE | 0.036 |
| Deuteranopia (no green cones) | #6592E9 | 0.024 |
| Tritanopia (no blue cones) | #00ADB8 | 0.112 |
| Achromatopsia (no color) | #999999 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B9BEB
#5B9BEB
oklch(68.2% 0.136 254.9)
- #C98B1D
#C98B1D
oklch(68.2% 0.136 75.2)
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 #5B9BEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.018
- Chefchaouen Blue #4895EF ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.044
- Soft Blue #6488EA ΔE 0.050
- Dodger Blue #1E90FF ΔE 0.062
- Periwinkle Blue #8F99FB ΔE 0.065
- Perrywinkle #8F8CE7 ΔE 0.067
- Faded Blue #658CBB ΔE 0.074
Use #5B9BEB 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.