#999DB3
Closest named color: Cool Gray (#8D99AE). oklch(70% 0.032 277.4), rgb(153, 157, 179).
Aa
Black text reads best on this color (7.82:1).
About this color
#999DB3 is a medium-light, muted blue. In OKLCH its lightness is 70%, its chroma 0.032 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.022 away. Black text reads best on it, at 7.82:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.82:1 |
| White text | 2.68:1 |
Values
| HEX | #999DB3 |
| RGB | rgb(153, 157, 179) |
| HSL | hsl(231, 15%, 65%) |
| OKLCH | oklch(70% 0.032 277.4) |
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 #999DB3 | 2.68:1 | Fails | Lc -57.3 | Large or bold text, headings |
| Black text on #999DB3 | 7.82:1 | AAA | Lc 51.9 | Large or bold text, headings |
| #999DB3 text on white | 2.68:1 | Fails | Lc 52.1 | Large or bold text, headings |
| #999DB3 text on black | 7.82:1 | AAA | Lc -49.8 | 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
#D7D9E1
oklch(88.6% 0.011 274.9)
-
Step 300
300
#BDC0CE
oklch(81% 0.02 276.3)
-
Step 400
400 (this color)
#999DB3
oklch(70% 0.032 277.4)
-
Step 500
500
#8388A3
oklch(63.2% 0.041 276.9)
-
Step 600
600
#6C718E
oklch(55.5% 0.045 277.2)
-
Step 700
700
#5A5F79
oklch(49.1% 0.042 276.2)
-
Step 800
800
#4A4D62
oklch(42.6% 0.035 278.4)
-
Step 900
900
#3E4050
oklch(37.6% 0.027 279.4)
-
Step 950
950
#24262F
oklch(27% 0.017 275.4)
#999DB3 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) | #979FB4 | 0.006 |
| Deuteranopia (no green cones) | #969DB2 | 0.005 |
| Tritanopia (no blue cones) | #93A1A4 | 0.030 |
| Achromatopsia (no color) | #9E9E9E | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999DB3
#999DB3
oklch(70% 0.032 277.4)
- #A49F88
#A49F88
oklch(70% 0.033 97)
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 #999DB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.022
- Bluey Grey #89A0B0 ΔE 0.024
- Cool Steel #97A7B3 ΔE 0.028
- Cool Grey #95A3A6 ΔE 0.030
- Bluegrey #85A3B2 ΔE 0.030
- Greyblue #77A1B5 ΔE 0.043
- Pewter #96A8A1 ΔE 0.047
- Dark Gray #A9A9A9 ΔE 0.048
Use #999DB3 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.