#999BFB
Closest named color: Periwinkle Blue (#8F99FB). oklch(72.8% 0.138 281.5), rgb(153, 155, 251).
Aa
Black text reads best on this color (8.43:1).
About this color
#999BFB is a medium-light, moderately saturated purple. In OKLCH its lightness is 73%, its chroma 0.138 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.015 away. Black text reads best on it, at 8.43:1.
| Hue family | Purples |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.43:1 |
| White text | 2.48:1 |
Values
| HEX | #999BFB |
| RGB | rgb(153, 155, 251) |
| HSL | hsl(239, 92%, 79%) |
| OKLCH | oklch(72.8% 0.138 281.5) |
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 #999BFB | 2.48:1 | Fails | Lc -53.9 | Large or bold text, headings |
| Black text on #999BFB | 8.43:1 | AAA | Lc 55.2 | Large or bold text, headings |
| #999BFB text on white | 2.48:1 | Fails | Lc 48.8 | Large or bold text, headings |
| #999BFB text on black | 8.43:1 | AAA | Lc -53.2 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FB
oklch(93.6% 0.026 283.5)
-
Step 200
200
#D3D6F9
oklch(88.5% 0.048 281.5)
-
Step 300
300
#B7BAF8
oklch(80.8% 0.087 282.1)
-
Step 400
400 (this color)
#999BFB
oklch(72.8% 0.138 281.5)
-
Step 500
500
#7B77F0
oklch(63.2% 0.176 281.6)
-
Step 600
600
#665CDE
oklch(55.6% 0.191 281.7)
-
Step 700
700
#554BC1
oklch(49.2% 0.178 281.4)
-
Step 800
800
#453E9C
oklch(42.7% 0.148 281.5)
-
Step 900
900
#39367C
oklch(37.6% 0.115 281.2)
-
Step 950
950
#212049
oklch(26.9% 0.074 281.3)
#999BFB 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) | #7AA8FF | 0.046 |
| Deuteranopia (no green cones) | #75A1F9 | 0.046 |
| Tritanopia (no blue cones) | #7CAEBF | 0.121 |
| Achromatopsia (no color) | #A4A4A4 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999BFB
#999BFB
oklch(72.8% 0.138 281.5)
- #B9A92D
#B9A92D
oklch(72.7% 0.138 101.6)
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 #999BFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.015
- Perrywinkle #8F8CE7 ΔE 0.047
- Lavender Blue #8B88F8 ΔE 0.053
- Periwinkle #8E82FE ΔE 0.067
- Liliac #C48EFD ΔE 0.068
- Pale Purple #B790D4 ΔE 0.069
- Cornflower Blue #6495ED ΔE 0.072
- Baby Purple #CA9BF7 ΔE 0.072
Use #999BFB 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.