#999FB0
Closest named color: Cool Steel (#97A7B3). oklch(70.3% 0.026 270.2), rgb(153, 159, 176).
Aa
Black text reads best on this color (7.94:1).
About this color
#999FB0 is a medium-light close to neutral grey. In OKLCH its lightness is 70%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Cool Steel (#97A7B3), ΔE 0.021 away. Black text reads best on it, at 7.94:1.
| Hue family | Neutrals |
| Lightness | medium-light (70%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 7.94:1 |
| White text | 2.64:1 |
Values
| HEX | #999FB0 |
| RGB | rgb(153, 159, 176) |
| HSL | hsl(224, 13%, 65%) |
| OKLCH | oklch(70.3% 0.026 270.2) |
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 #999FB0 | 2.64:1 | Fails | Lc -56.7 | Large or bold text, headings |
| Black text on #999FB0 | 7.94:1 | AAA | Lc 52.5 | Large or bold text, headings |
| #999FB0 text on white | 2.64:1 | Fails | Lc 51.5 | Large or bold text, headings |
| #999FB0 text on black | 7.94:1 | AAA | Lc -50.4 | 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
#E8EAED
oklch(93.6% 0.005 258.3)
-
Step 200
200
#D7D9DF
oklch(88.6% 0.008 271.3)
-
Step 300
300
#BCC0CB
oklch(80.8% 0.016 269.9)
-
Step 400
400 (this color)
#999FB0
oklch(70.3% 0.026 270.2)
-
Step 500
500
#82899E
oklch(63.2% 0.033 270.9)
-
Step 600
600
#6B7389
oklch(55.7% 0.036 269.5)
-
Step 700
700
#596074
oklch(49% 0.033 270)
-
Step 800
800
#494F5F
oklch(42.8% 0.028 269)
-
Step 900
900
#3D414D
oklch(37.6% 0.021 270.8)
-
Step 950
950
#24262D
oklch(27% 0.013 272.9)
#999FB0 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) | #9AA0B1 | 0.003 |
| Deuteranopia (no green cones) | #999EB0 | 0.003 |
| Tritanopia (no blue cones) | #94A2A4 | 0.023 |
| Achromatopsia (no color) | #9F9F9F | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999FB0
#999FB0
oklch(70.3% 0.026 270.2)
- #A59F8E
#A59F8E
oklch(70.3% 0.025 90.8)
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 #999FB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.021
- Bluey Grey #89A0B0 ΔE 0.021
- Cool Grey #95A3A6 ΔE 0.022
- Cool Gray #8D99AE ΔE 0.025
- Bluegrey #85A3B2 ΔE 0.027
- Pewter #96A8A1 ΔE 0.039
- Dark Gray #A9A9A9 ΔE 0.041
- Greyblue #77A1B5 ΔE 0.043
Use #999FB0 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.