#999EE4
Closest named color: Periwinkle Blue (#8F99FB). oklch(72.2% 0.102 280.4), rgb(153, 158, 228).
Aa
Black text reads best on this color (8.36:1).
About this color
#999EE4 is a medium-light, moderately saturated purple. In OKLCH its lightness is 72%, its chroma 0.102 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.042 away. Black text reads best on it, at 8.36:1.
| Hue family | Purples |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.36:1 |
| White text | 2.51:1 |
Values
| HEX | #999EE4 |
| RGB | rgb(153, 158, 228) |
| HSL | hsl(236, 58%, 75%) |
| OKLCH | oklch(72.2% 0.102 280.4) |
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 #999EE4 | 2.51:1 | Fails | Lc -54.3 | Large or bold text, headings |
| Black text on #999EE4 | 8.36:1 | AAA | Lc 54.8 | Large or bold text, headings |
| #999EE4 text on white | 2.51:1 | Fails | Lc 49.2 | Large or bold text, headings |
| #999EE4 text on black | 8.36:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F6
oklch(93.6% 0.018 279.1)
-
Step 200
200
#D4D7F1
oklch(88.5% 0.036 280.4)
-
Step 300
300
#B8BDEA
oklch(81% 0.064 279.9)
-
Step 400
400 (this color)
#999EE4
oklch(72.2% 0.102 280.4)
-
Step 500
500
#7B7FD6
oklch(63.1% 0.13 280)
-
Step 600
600
#6566C3
oklch(55.5% 0.141 280.3)
-
Step 700
700
#5455A9
oklch(49.2% 0.131 279.9)
-
Step 800
800
#454689
oklch(42.8% 0.109 280.1)
-
Step 900
900
#3A3B6D
oklch(37.7% 0.084 280.7)
-
Step 950
950
#222340
oklch(27.1% 0.053 280.7)
#999EE4 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) | #89A6E7 | 0.027 |
| Deuteranopia (no green cones) | #85A1E2 | 0.027 |
| Tritanopia (no blue cones) | #85ABB7 | 0.089 |
| Achromatopsia (no color) | #A3A3A3 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999EE4
#999EE4
oklch(72.2% 0.102 280.4)
- #B4A758
#B4A758
oklch(72.3% 0.102 100.1)
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 #999EE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.042
- Perrywinkle #8F8CE7 ΔE 0.052
- Pale Purple #B790D4 ΔE 0.054
- Carolina Blue #8AB8FE ΔE 0.069
- Cornflower Blue #6495ED ΔE 0.074
- Lavender Blue #8B88F8 ΔE 0.074
- Baby Purple #CA9BF7 ΔE 0.078
- Cool Gray #8D99AE ΔE 0.082
Use #999EE4 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.