#99A8BB
Closest named color: Cool Steel (#97A7B3). oklch(72.6% 0.032 254.4), rgb(153, 168, 187).
Aa
Black text reads best on this color (8.67:1).
About this color
#99A8BB is a medium-light, muted blue. In OKLCH its lightness is 73%, its chroma 0.032 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.012 away. Black text reads best on it, at 8.67:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.67:1 |
| White text | 2.42:1 |
Values
| HEX | #99A8BB |
| RGB | rgb(153, 168, 187) |
| HSL | hsl(214, 20%, 67%) |
| OKLCH | oklch(72.6% 0.032 254.4) |
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 #99A8BB | 2.42:1 | Fails | Lc -52.7 | Large or bold text, headings |
| Black text on #99A8BB | 8.67:1 | AAA | Lc 56.3 | Large or bold text, headings |
| #99A8BB text on white | 2.42:1 | Fails | Lc 47.7 | Large or bold text, headings |
| #99A8BB text on black | 8.67:1 | AAA | Lc -54.3 | 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
#F4F5F7
oklch(97% 0.003 264.5)
-
Step 100
100
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D4DAE1
oklch(88.6% 0.012 252.1)
-
Step 300
300
#B8C2CE
oklch(81% 0.02 252.9)
-
Step 400
400 (this color)
#99A8BB
oklch(72.6% 0.032 254.4)
-
Step 500
500
#798BA3
oklch(63.1% 0.042 255.7)
-
Step 600
600
#61758E
oklch(55.6% 0.046 254.2)
-
Step 700
700
#516278
oklch(49.1% 0.041 255)
-
Step 800
800
#425062
oklch(42.6% 0.035 254.9)
-
Step 900
900
#384350
oklch(37.8% 0.027 252.8)
-
Step 950
950
#21272F
oklch(27% 0.017 255.7)
#99A8BB 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) | #A2A8BC | 0.012 |
| Deuteranopia (no green cones) | #9EA5BB | 0.010 |
| Tritanopia (no blue cones) | #91ACAE | 0.028 |
| Achromatopsia (no color) | #A6A6A6 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99A8BB
#99A8BB
oklch(72.6% 0.032 254.4)
- #B3A491
#B3A491
oklch(72.6% 0.032 73.8)
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 #99A8BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.012
- Cool Grey #95A3A6 ΔE 0.031
- Bluegrey #85A3B2 ΔE 0.033
- Dark Gray #A9A9A9 ΔE 0.034
- Bluey Grey #89A0B0 ΔE 0.034
- Pewter #96A8A1 ΔE 0.039
- Cool Gray #8D99AE ΔE 0.046
- French Gray #ADB5BD ΔE 0.047
Use #99A8BB 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.