#5B8EFF
Closest named color: Soft Blue (#6488EA). oklch(66.6% 0.176 264), rgb(91, 142, 255).
Aa
Black text reads best on this color (6.75:1).
About this color
#5B8EFF is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.176 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.033 away. Black text reads best on it, at 6.75:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.75:1 |
| White text | 3.10:1 |
Values
| HEX | #5B8EFF |
| RGB | rgb(91, 142, 255) |
| HSL | hsl(221, 100%, 68%) |
| OKLCH | oklch(66.6% 0.176 264) |
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 #5B8EFF | 3.10:1 | AA large text | Lc -63.1 | Content text, not long reading |
| Black text on #5B8EFF | 6.75:1 | AA | Lc 46.3 | Large or bold text, headings |
| #5B8EFF text on white | 3.10:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #5B8EFF text on black | 6.75:1 | AA | Lc -44.0 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAFA
oklch(88.6% 0.048 263.1)
-
Step 300
300
#A4C1F9
oklch(81% 0.086 263.3)
-
Step 400
400
#749EF6
oklch(70.7% 0.137 263.9)
-
Step 500
500 (this color)
#5B8EFF
oklch(66.6% 0.176 264)
-
Step 600
600
#3669E1
oklch(55.5% 0.191 263.9)
-
Step 700
700
#2957C4
oklch(49.2% 0.178 263.8)
-
Step 800
800
#23489E
oklch(42.8% 0.147 263.8)
-
Step 900
900
#213D7E
oklch(37.7% 0.115 264.1)
-
Step 950
950
#14244A
oklch(27% 0.074 264.7)
#5B8EFF 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) | #579AFF | 0.031 |
| Deuteranopia (no green cones) | #3B8BFD | 0.029 |
| Tritanopia (no blue cones) | #00A8BA | 0.147 |
| Achromatopsia (no color) | #929292 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B8EFF
#5B8EFF
oklch(66.6% 0.176 264)
- #BB8B00
#BB8B00
oklch(66.5% 0.137 84)
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 #5B8EFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.036
- Cornflower Blue #6495ED ΔE 0.037
- Dodger Blue #1E90FF ΔE 0.040
- Dark Sky Blue #448EE4 ΔE 0.047
- Cornflower #6A79F7 ΔE 0.052
- Lavender Blue #8B88F8 ΔE 0.058
- Periwinkle #8E82FE ΔE 0.065
Use #5B8EFF 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.