#5B8EFB
Closest named color: Soft Blue (#6488EA). oklch(66.4% 0.171 263.6), rgb(91, 142, 251).
Aa
Black text reads best on this color (6.70:1).
About this color
#5B8EFB is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.171 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.028 away. Black text reads best on it, at 6.70:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.70:1 |
| White text | 3.13:1 |
Values
| HEX | #5B8EFB |
| RGB | rgb(91, 142, 251) |
| HSL | hsl(221, 95%, 67%) |
| OKLCH | oklch(66.4% 0.171 263.6) |
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 #5B8EFB | 3.13:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #5B8EFB | 6.70:1 | AA | Lc 46.0 | Large or bold text, headings |
| #5B8EFB text on white | 3.13:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #5B8EFB text on black | 6.70:1 | AA | Lc -43.7 | 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
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#C9DAF9
oklch(88.5% 0.047 262.5)
-
Step 300
300
#A5C1F7
oklch(80.9% 0.083 263.3)
-
Step 400
400
#759EF4
oklch(70.6% 0.134 263.9)
-
Step 500
500 (this color)
#5B8EFB
oklch(66.4% 0.171 263.6)
-
Step 600
600
#376ADE
oklch(55.5% 0.186 263.6)
-
Step 700
700
#2A58C1
oklch(49.2% 0.173 263.5)
-
Step 800
800
#23489C
oklch(42.6% 0.144 263.6)
-
Step 900
900
#213E7C
oklch(37.8% 0.111 263.2)
-
Step 950
950
#142549
oklch(27.2% 0.071 263.4)
#5B8EFB 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) | #5A99FF | 0.028 |
| Deuteranopia (no green cones) | #408BF9 | 0.026 |
| Tritanopia (no blue cones) | #00A7B8 | 0.143 |
| Achromatopsia (no color) | #929292 | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B8EFB
#5B8EFB
oklch(66.4% 0.171 263.6)
- #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 #5B8EFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.028
- Chefchaouen Blue #4895EF ΔE 0.032
- Cornflower Blue #6495ED ΔE 0.032
- Dodger Blue #1E90FF ΔE 0.040
- Dark Sky Blue #448EE4 ΔE 0.042
- Cornflower #6A79F7 ΔE 0.052
- Lavender Blue #8B88F8 ΔE 0.058
- Periwinkle #8E82FE ΔE 0.066
Use #5B8EFB 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.