#999BBC
Closest named color: Cool Gray (#8D99AE). oklch(69.9% 0.048 282.3), rgb(153, 155, 188).
Aa
Black text reads best on this color (7.76:1).
About this color
#999BBC is a medium-light, muted purple. In OKLCH its lightness is 70%, its chroma 0.048 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.028 away. Black text reads best on it, at 7.76:1.
| Hue family | Purples |
| Lightness | medium-light (70%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.76:1 |
| White text | 2.70:1 |
Values
| HEX | #999BBC |
| RGB | rgb(153, 155, 188) |
| HSL | hsl(237, 21%, 67%) |
| OKLCH | oklch(69.9% 0.048 282.3) |
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 #999BBC | 2.70:1 | Fails | Lc -57.6 | Large or bold text, headings |
| Black text on #999BBC | 7.76:1 | AAA | Lc 51.6 | Large or bold text, headings |
| #999BBC text on white | 2.70:1 | Fails | Lc 52.4 | Large or bold text, headings |
| #999BBC text on black | 7.76:1 | AAA | Lc -49.4 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E9E9F0
oklch(93.6% 0.009 286.2)
-
Step 200
200
#D7D8E4
oklch(88.5% 0.016 282.2)
-
Step 300
300
#BDBFD4
oklch(81% 0.029 281.4)
-
Step 400
400 (this color)
#999BBC
oklch(69.9% 0.048 282.3)
-
Step 500
500
#8385AE
oklch(63% 0.061 282.3)
-
Step 600
600
#6D6F9A
oklch(55.7% 0.066 281.9)
-
Step 700
700
#5B5C83
oklch(49% 0.062 282.7)
-
Step 800
800
#4A4C6B
oklch(42.8% 0.051 281.1)
-
Step 900
900
#3E3F57
oklch(37.7% 0.041 282.4)
-
Step 950
950
#242533
oklch(27% 0.026 281.3)
#999BBC 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) | #939EBE | 0.011 |
| Deuteranopia (no green cones) | #919CBB | 0.011 |
| Tritanopia (no blue cones) | #91A1A6 | 0.043 |
| Achromatopsia (no color) | #9D9D9D | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999BBC
#999BBC
oklch(69.9% 0.048 282.3)
- #A4A07D
#A4A07D
oklch(70% 0.049 102.1)
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 #999BBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.028
- Bluey Grey #89A0B0 ΔE 0.034
- Cool Steel #97A7B3 ΔE 0.040
- Bluegrey #85A3B2 ΔE 0.040
- Cool Grey #95A3A6 ΔE 0.046
- Greyblue #77A1B5 ΔE 0.048
- Dusty Lavender #AC86A8 ΔE 0.058
- Heather #A484AC ΔE 0.060
Use #999BBC 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.