#859FFB
Closest named color: Periwinkle Blue (#8F99FB). oklch(72.2% 0.137 270.7), rgb(133, 159, 251).
Aa
Black text reads best on this color (8.34:1).
About this color
#859FFB is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.137 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.019 away. Black text reads best on it, at 8.34:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.34:1 |
| White text | 2.51:1 |
Values
| HEX | #859FFB |
| RGB | rgb(133, 159, 251) |
| HSL | hsl(227, 94%, 75%) |
| OKLCH | oklch(72.2% 0.137 270.7) |
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 #859FFB | 2.51:1 | Fails | Lc -54.3 | Large or bold text, headings |
| Black text on #859FFB | 8.34:1 | AAA | Lc 54.8 | Large or bold text, headings |
| #859FFB text on white | 2.51:1 | Fails | Lc 49.2 | Large or bold text, headings |
| #859FFB text on black | 8.34:1 | AAA | Lc -52.7 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ACBEF9
oklch(80.9% 0.086 271.2)
-
Step 400
400 (this color)
#859FFB
oklch(72.2% 0.137 270.7)
-
Step 500
500
#637EF2
oklch(63% 0.176 270.8)
-
Step 600
600
#4C64E1
oklch(55.6% 0.191 270.7)
-
Step 700
700
#3E52C3
oklch(49.1% 0.177 270.8)
-
Step 800
800
#33449E
oklch(42.7% 0.147 270.8)
-
Step 900
900
#2C3A7D
oklch(37.6% 0.114 271)
-
Step 950
950
#1A2349
oklch(27.1% 0.071 270.9)
#859FFB 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) | #7CA9FF | 0.026 |
| Deuteranopia (no green cones) | #719FF9 | 0.023 |
| Tritanopia (no blue cones) | #57B2C1 | 0.123 |
| Achromatopsia (no color) | #A3A3A3 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #859FFB
#859FFB
oklch(72.2% 0.137 270.7)
- #C6A125
#C6A125
oklch(72.3% 0.138 90.8)
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 #859FFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.019
- Perrywinkle #8F8CE7 ΔE 0.051
- Cornflower Blue #6495ED ΔE 0.052
- Lavender Blue #8B88F8 ΔE 0.057
- Carolina Blue #8AB8FE ΔE 0.066
- Periwinkle #8E82FE ΔE 0.073
- Chefchaouen Blue #4895EF ΔE 0.074
- Soft Blue #6488EA ΔE 0.078
Use #859FFB 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.