#5B8FFE
Closest named color: Soft Blue (#6488EA). oklch(66.8% 0.174 263.5), rgb(91, 143, 254).
Aa
Black text reads best on this color (6.80:1).
About this color
#5B8FFE is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.174 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.032 away. Black text reads best on it, at 6.80:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 6.80:1 |
| White text | 3.08:1 |
Values
| HEX | #5B8FFE |
| RGB | rgb(91, 143, 254) |
| HSL | hsl(221, 99%, 68%) |
| OKLCH | oklch(66.8% 0.174 263.5) |
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 #5B8FFE | 3.08:1 | AA large text | Lc -62.9 | Content text, not long reading |
| Black text on #5B8FFE | 6.80:1 | AA | Lc 46.6 | Large or bold text, headings |
| #5B8FFE text on white | 3.08:1 | AA large text | Lc 57.5 | Large or bold text, headings |
| #5B8FFE text on black | 6.80:1 | AA | Lc -44.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAF9
oklch(88.5% 0.047 262.5)
-
Step 300
300
#A4C1F8
oklch(80.9% 0.084 263)
-
Step 400
400
#749EF5
oklch(70.6% 0.136 263.7)
-
Step 500
500 (this color)
#5B8FFE
oklch(66.8% 0.174 263.5)
-
Step 600
600
#366AE0
oklch(55.7% 0.189 263.5)
-
Step 700
700
#2957C2
oklch(49% 0.175 263.6)
-
Step 800
800
#23489D
oklch(42.7% 0.145 263.7)
-
Step 900
900
#213D7D
oklch(37.6% 0.114 264)
-
Step 950
950
#132449
oklch(26.8% 0.072 263.7)
#5B8FFE 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) | #5A9BFF | 0.031 |
| Deuteranopia (no green cones) | #3E8CFC | 0.027 |
| Tritanopia (no blue cones) | #00A8BA | 0.144 |
| Achromatopsia (no color) | #939393 | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B8FFE
#5B8FFE
oklch(66.8% 0.174 263.5)
- #BC8B00
#BC8B00
oklch(66.6% 0.137 83.4)
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 #5B8FFE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.033
- Cornflower Blue #6495ED ΔE 0.034
- Dodger Blue #1E90FF ΔE 0.040
- Dark Sky Blue #448EE4 ΔE 0.046
- Cornflower #6A79F7 ΔE 0.054
- Lavender Blue #8B88F8 ΔE 0.058
- Periwinkle #8E82FE ΔE 0.066
Use #5B8FFE 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.