#999FF4
Closest named color: Periwinkle Blue (#8F99FB). oklch(73.2% 0.123 279.8), rgb(153, 159, 244).
Aa
Black text reads best on this color (8.62:1).
About this color
#999FF4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.123 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.025 away. Black text reads best on it, at 8.62:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.62:1 |
| White text | 2.43:1 |
Values
| HEX | #999FF4 |
| RGB | rgb(153, 159, 244) |
| HSL | hsl(236, 81%, 78%) |
| OKLCH | oklch(73.2% 0.123 279.8) |
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 #999FF4 | 2.43:1 | Fails | Lc -52.9 | Large or bold text, headings |
| Black text on #999FF4 | 8.62:1 | AAA | Lc 56.1 | Large or bold text, headings |
| #999FF4 text on white | 2.43:1 | Fails | Lc 47.9 | Large or bold text, headings |
| #999FF4 text on black | 8.62:1 | AAA | Lc -54.1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F9
oklch(93.6% 0.022 277.5)
-
Step 200
200
#D3D7F6
oklch(88.6% 0.043 279.7)
-
Step 300
300
#B6BCF2
oklch(80.9% 0.076 279.6)
-
Step 400
400 (this color)
#999FF4
oklch(73.2% 0.123 279.8)
-
Step 500
500
#787BE5
oklch(63% 0.157 279.7)
-
Step 600
600
#6362D3
oklch(55.7% 0.169 279.8)
-
Step 700
700
#5250B7
oklch(49.1% 0.158 279.7)
-
Step 800
800
#434294
oklch(42.6% 0.131 279.8)
-
Step 900
900
#383976
oklch(37.7% 0.102 279.6)
-
Step 950
950
#212245
oklch(27.1% 0.064 280)
#999FF4 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) | #83A9F7 | 0.035 |
| Deuteranopia (no green cones) | #7EA3F2 | 0.035 |
| Tritanopia (no blue cones) | #7FAFBE | 0.107 |
| Achromatopsia (no color) | #A6A6A6 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999FF4
#999FF4
oklch(73.2% 0.123 279.8)
- #BBAA44
#BBAA44
oklch(73.3% 0.123 99.8)
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 #999FF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.025
- Perrywinkle #8F8CE7 ΔE 0.052
- Carolina Blue #8AB8FE ΔE 0.064
- Pale Purple #B790D4 ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.065
- Baby Purple #CA9BF7 ΔE 0.072
- Cornflower Blue #6495ED ΔE 0.073
- Pastel Purple #CAA0FF ΔE 0.074
Use #999FF4 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.