#B1B5FF
Closest named color: Pastel Blue (#A2BFFE). oklch(79.7% 0.105 281.4), rgb(177, 181, 255).
Aa
Black text reads best on this color (10.92:1).
About this color
#B1B5FF is a light, moderately saturated purple. In OKLCH its lightness is 80%, its chroma 0.105 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Pastel Blue (#A2BFFE), ΔE 0.031 away. Black text reads best on it, at 10.92:1.
| Hue family | Purples |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Pastel Blue (#A2BFFE) |
| Black text | 10.92:1 |
| White text | 1.92:1 |
Values
| HEX | #B1B5FF |
| RGB | rgb(177, 181, 255) |
| HSL | hsl(237, 100%, 85%) |
| OKLCH | oklch(79.7% 0.105 281.4) |
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 #B1B5FF | 1.92:1 | Fails | Lc -41.0 | Non-text elements, placeholder text |
| Black text on #B1B5FF | 10.92:1 | AAA | Lc 67.2 | Content text, not long reading |
| #B1B5FF text on white | 1.92:1 | Fails | Lc 36.7 | Non-text elements, placeholder text |
| #B1B5FF text on black | 10.92:1 | AAA | Lc -65.7 | Content text, not long reading |
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 300.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E6E8FE
oklch(93.6% 0.03 281.7)
-
Step 200
200
#D2D5FF
oklch(88.4% 0.058 281.9)
-
Step 300
300 (this color)
#B1B5FF
oklch(79.7% 0.105 281.4)
-
Step 400
400
#9192FF
oklch(70.7% 0.157 281.2)
-
Step 500
500
#7971FF
oklch(63% 0.204 281.3)
-
Step 600
600
#6551F4
oklch(55.6% 0.232 281.3)
-
Step 700
700
#5540D5
oklch(49.2% 0.216 281.3)
-
Step 800
800
#4536AC
oklch(42.7% 0.179 281.4)
-
Step 900
900
#393188
oklch(37.7% 0.14 281.5)
-
Step 950
950
#211E50
oklch(27.1% 0.089 281.4)
#B1B5FF 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) | #9FBEFF | 0.031 |
| Deuteranopia (no green cones) | #9CB8FD | 0.028 |
| Tritanopia (no blue cones) | #9DC3CF | 0.093 |
| Achromatopsia (no color) | #BBBBBB | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B1B5FF
#B1B5FF
oklch(79.7% 0.105 281.4)
- #CBBF6D
#CBBF6D
oklch(79.7% 0.104 101.1)
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 #B1B5FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Pastel Blue #A2BFFE ΔE 0.031
- Pale Violet #CEAEFA ΔE 0.042
- Carolina Blue #8AB8FE ΔE 0.048
- Light Violet #D6B4FC ΔE 0.052
- Light Periwinkle #C1C6FC ΔE 0.053
- Lilac #CEA2FD ΔE 0.059
- Pastel Purple #CAA0FF ΔE 0.060
- Baby Purple #CA9BF7 ΔE 0.069
Use #B1B5FF 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.