#5B8EF8
Closest named color: Soft Blue (#6488EA). oklch(66.2% 0.167 263.2), rgb(91, 142, 248).
Aa
Black text reads best on this color (6.66:1).
About this color
#5B8EF8 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.167 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.024 away. Black text reads best on it, at 6.66:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.66:1 |
| White text | 3.14:1 |
Values
| HEX | #5B8EF8 |
| RGB | rgb(91, 142, 248) |
| HSL | hsl(221, 92%, 66%) |
| OKLCH | oklch(66.2% 0.167 263.2) |
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 #5B8EF8 | 3.14:1 | AA large text | Lc -63.7 | Content text, not long reading |
| Black text on #5B8EF8 | 6.66:1 | AA | Lc 45.8 | Large or bold text, headings |
| #5B8EF8 text on white | 3.14:1 | AA large text | Lc 58.3 | Large or bold text, headings |
| #5B8EF8 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF8
oklch(88.6% 0.045 263.1)
-
Step 300
300
#A5C1F6
oklch(80.9% 0.081 263)
-
Step 400
400
#759FF2
oklch(70.7% 0.131 263.1)
-
Step 500
500 (this color)
#5B8EF8
oklch(66.2% 0.167 263.2)
-
Step 600
600
#376BDC
oklch(55.6% 0.182 263.2)
-
Step 700
700
#2A58BF
oklch(49% 0.17 263.3)
-
Step 800
800
#24499A
oklch(42.7% 0.139 263.3)
-
Step 900
900
#213E7B
oklch(37.7% 0.11 263.1)
-
Step 950
950
#142548
oklch(27.1% 0.069 263.1)
#5B8EF8 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) | #5D99FC | 0.029 |
| Deuteranopia (no green cones) | #448AF6 | 0.025 |
| Tritanopia (no blue cones) | #00A6B7 | 0.139 |
| Achromatopsia (no color) | #919191 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B8EF8
#5B8EF8
oklch(66.2% 0.167 263.2)
- #BB8A00
#BB8A00
oklch(66.3% 0.136 83.3)
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 #5B8EF8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.024
- Chefchaouen Blue #4895EF ΔE 0.029
- Cornflower Blue #6495ED ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.038
- Dodger Blue #1E90FF ΔE 0.040
- Cornflower #6A79F7 ΔE 0.052
- Lavender Blue #8B88F8 ΔE 0.058
- Perrywinkle #8F8CE7 ΔE 0.066
Use #5B8EF8 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.