#999FDE
Closest named color: Periwinkle Blue (#8F99FB). oklch(72.1% 0.092 279.6), rgb(153, 159, 222).
Aa
Black text reads best on this color (8.36:1).
About this color
#999FDE is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.092 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.051 away. Black text reads best on it, at 8.36:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.36:1 |
| White text | 2.50:1 |
Values
| HEX | #999FDE |
| RGB | rgb(153, 159, 222) |
| HSL | hsl(235, 51%, 74%) |
| OKLCH | oklch(72.1% 0.092 279.6) |
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 #999FDE | 2.50:1 | Fails | Lc -54.3 | Large or bold text, headings |
| Black text on #999FDE | 8.36:1 | AAA | Lc 54.8 | Large or bold text, headings |
| #999FDE text on white | 2.50:1 | Fails | Lc 49.2 | Large or bold text, headings |
| #999FDE 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
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D4D7EE
oklch(88.4% 0.032 279.8)
-
Step 300
300
#B8BDE6
oklch(80.8% 0.058 279.6)
-
Step 400
400 (this color)
#999FDE
oklch(72.1% 0.092 279.6)
-
Step 500
500
#7B81CF
oklch(63.2% 0.117 279.1)
-
Step 600
600
#6569BC
oklch(55.6% 0.127 279.3)
-
Step 700
700
#5457A2
oklch(49.1% 0.118 279.4)
-
Step 800
800
#454783
oklch(42.6% 0.098 279.9)
-
Step 900
900
#3A3C69
oklch(37.7% 0.076 280.1)
-
Step 950
950
#22233E
oklch(26.9% 0.05 280.9)
#999FDE 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) | #8CA6E1 | 0.023 |
| Deuteranopia (no green cones) | #89A1DC | 0.022 |
| Tritanopia (no blue cones) | #87ABB5 | 0.082 |
| Achromatopsia (no color) | #A3A3A3 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999FDE
#999FDE
oklch(72.1% 0.092 279.6)
- #B3A661
#B3A661
oklch(72.1% 0.091 98.9)
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 #999FDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.051
- Pale Purple #B790D4 ΔE 0.054
- Perrywinkle #8F8CE7 ΔE 0.058
- Carolina Blue #8AB8FE ΔE 0.070
- Cool Gray #8D99AE ΔE 0.073
- Cool Steel #97A7B3 ΔE 0.074
- Bluey Grey #89A0B0 ΔE 0.075
- Bluegrey #85A3B2 ΔE 0.076
Use #999FDE 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.