#5B9BEE
Closest named color: Cornflower Blue (#6495ED). oklch(68.4% 0.14 255.6), rgb(91, 155, 238).
Aa
Black text reads best on this color (7.36:1).
About this color
#5B9BEE is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.140 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.017 away. Black text reads best on it, at 7.36:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.140) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.36:1 |
| White text | 2.85:1 |
Values
| HEX | #5B9BEE |
| RGB | rgb(91, 155, 238) |
| HSL | hsl(214, 81%, 65%) |
| OKLCH | oklch(68.4% 0.14 255.6) |
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 #5B9BEE | 2.85:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #5B9BEE | 7.36:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #5B9BEE text on white | 2.85:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #5B9BEE text on black | 7.36:1 | AAA | Lc -47.4 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBFA
oklch(88.4% 0.05 255.9)
-
Step 300
300
#9BC3F9
oklch(80.8% 0.088 256.1)
-
Step 400
400 (this color)
#5B9BEE
oklch(68.4% 0.14 255.6)
-
Step 500
500
#3188F2
oklch(63% 0.179 255.7)
-
Step 600
600
#0070DD
oklch(55.6% 0.187 255.6)
-
Step 700
700
#005EBB
oklch(49.1% 0.165 255.5)
-
Step 800
800
#004C9B
oklch(42.6% 0.144 255.8)
-
Step 900
900
#0B407D
oklch(37.6% 0.116 255.7)
-
Step 950
950
#092649
oklch(26.9% 0.074 255.3)
#5B9BEE 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) | #77A1F1 | 0.035 |
| Deuteranopia (no green cones) | #6393EC | 0.021 |
| Tritanopia (no blue cones) | #00AEB9 | 0.116 |
| Achromatopsia (no color) | #999999 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B9BEE
#5B9BEE
oklch(68.4% 0.14 255.6)
- #CA8B12
#CA8B12
oklch(68.3% 0.14 75.7)
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 #5B9BEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.017
- Chefchaouen Blue #4895EF ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.044
- Soft Blue #6488EA ΔE 0.049
- Dodger Blue #1E90FF ΔE 0.060
- Periwinkle Blue #8F99FB ΔE 0.063
- Perrywinkle #8F8CE7 ΔE 0.067
- Lavender Blue #8B88F8 ΔE 0.073
Use #5B9BEE 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.