#999CB3
Closest named color: Cool Gray (#8D99AE). oklch(69.8% 0.034 279.6), rgb(153, 156, 179).
Aa
Black text reads best on this color (7.76:1).
About this color
#999CB3 is a medium-light, muted blue. In OKLCH its lightness is 70%, its chroma 0.034 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.020 away. Black text reads best on it, at 7.76:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.76:1 |
| White text | 2.70:1 |
Values
| HEX | #999CB3 |
| RGB | rgb(153, 156, 179) |
| HSL | hsl(233, 15%, 65%) |
| OKLCH | oklch(69.8% 0.034 279.6) |
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 #999CB3 | 2.70:1 | Fails | Lc -57.7 | Large or bold text, headings |
| Black text on #999CB3 | 7.76:1 | AAA | Lc 51.5 | Large or bold text, headings |
| #999CB3 text on white | 2.70:1 | Fails | Lc 52.5 | Large or bold text, headings |
| #999CB3 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E9E9EE
oklch(93.5% 0.007 286.3)
-
Step 200
200
#D7D8E1
oklch(88.4% 0.012 281.1)
-
Step 300
300
#BDBFCE
oklch(80.8% 0.021 279.9)
-
Step 400
400 (this color)
#999CB3
oklch(69.8% 0.034 279.6)
-
Step 500
500
#8487A4
oklch(63.1% 0.044 280.4)
-
Step 600
600
#6D718F
oklch(55.6% 0.047 278.8)
-
Step 700
700
#5B5E79
oklch(49% 0.043 279.7)
-
Step 800
800
#4B4D63
oklch(42.7% 0.036 280.7)
-
Step 900
900
#3E4051
oklch(37.7% 0.029 279.6)
-
Step 950
950
#24262F
oklch(27% 0.017 275.4)
#999CB3 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) | #969EB4 | 0.006 |
| Deuteranopia (no green cones) | #959CB2 | 0.006 |
| Tritanopia (no blue cones) | #93A0A3 | 0.031 |
| Achromatopsia (no color) | #9D9D9D | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999CB3
#999CB3
oklch(69.8% 0.034 279.6)
- #A29F87
#A29F87
oklch(69.8% 0.034 101.4)
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 #999CB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.020
- Bluey Grey #89A0B0 ΔE 0.025
- Cool Steel #97A7B3 ΔE 0.031
- Bluegrey #85A3B2 ΔE 0.032
- Cool Grey #95A3A6 ΔE 0.032
- Greyblue #77A1B5 ΔE 0.044
- Pewter #96A8A1 ΔE 0.050
- Dark Gray #A9A9A9 ΔE 0.050
Use #999CB3 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.