#999FB3
Closest named color: Cool Steel (#97A7B3). oklch(70.4% 0.03 272.4), rgb(153, 159, 179).
Aa
Black text reads best on this color (7.96:1).
About this color
#999FB3 is a medium-light close to neutral grey. In OKLCH its lightness is 70%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Cool Steel (#97A7B3), ΔE 0.022 away. Black text reads best on it, at 7.96:1.
| Hue family | Neutrals |
| Lightness | medium-light (70%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 7.96:1 |
| White text | 2.63:1 |
Values
| HEX | #999FB3 |
| RGB | rgb(153, 159, 179) |
| HSL | hsl(226, 15%, 65%) |
| OKLCH | oklch(70.4% 0.03 272.4) |
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 #999FB3 | 2.63:1 | Fails | Lc -56.6 | Large or bold text, headings |
| Black text on #999FB3 | 7.96:1 | AAA | Lc 52.6 | Large or bold text, headings |
| #999FB3 text on white | 2.63:1 | Fails | Lc 51.4 | Large or bold text, headings |
| #999FB3 text on black | 7.96:1 | AAA | Lc -50.5 | 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
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D6D9E0
oklch(88.5% 0.01 267.4)
-
Step 300
300
#BCC0CD
oklch(80.9% 0.019 272.3)
-
Step 400
400 (this color)
#999FB3
oklch(70.4% 0.03 272.4)
-
Step 500
500
#8188A1
oklch(63% 0.038 272.9)
-
Step 600
600
#6B728C
oklch(55.6% 0.041 273.2)
-
Step 700
700
#596077
oklch(49.2% 0.038 271.7)
-
Step 800
800
#494E61
oklch(42.7% 0.032 273.4)
-
Step 900
900
#3D414F
oklch(37.7% 0.025 272.6)
-
Step 950
950
#24262E
oklch(27% 0.015 274.3)
#999FB3 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) | #9AA0B4 | 0.003 |
| Deuteranopia (no green cones) | #989EB2 | 0.003 |
| Tritanopia (no blue cones) | #93A3A5 | 0.028 |
| Achromatopsia (no color) | #9F9F9F | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999FB3
#999FB3
oklch(70.4% 0.03 272.4)
- #A6A08B
#A6A08B
oklch(70.5% 0.03 93.9)
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 #999FB3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.022
- Bluey Grey #89A0B0 ΔE 0.022
- Cool Gray #8D99AE ΔE 0.025
- Cool Grey #95A3A6 ΔE 0.026
- Bluegrey #85A3B2 ΔE 0.028
- Pewter #96A8A1 ΔE 0.043
- Greyblue #77A1B5 ΔE 0.043
- Dark Gray #A9A9A9 ΔE 0.043
Use #999FB3 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.