#99ADBB
Closest named color: Cool Steel (#97A7B3). oklch(73.7% 0.03 238.4), rgb(153, 173, 187).
Aa
Black text reads best on this color (9.04:1).
About this color
#99ADBB is a medium-light, muted blue. In OKLCH its lightness is 74%, its chroma 0.030 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.018 away. Black text reads best on it, at 9.04:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 9.04:1 |
| White text | 2.32:1 |
Values
| HEX | #99ADBB |
| RGB | rgb(153, 173, 187) |
| HSL | hsl(205, 20%, 67%) |
| OKLCH | oklch(73.7% 0.03 238.4) |
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 #99ADBB | 2.32:1 | Fails | Lc -50.7 | Large or bold text, headings |
| Black text on #99ADBB | 9.04:1 | AAA | Lc 58.2 | Large or bold text, headings |
| #99ADBB text on white | 2.32:1 | Fails | Lc 45.8 | Large or bold text, headings |
| #99ADBB text on black | 9.04:1 | AAA | Lc -56.3 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E7EAED
oklch(93.6% 0.005 247.9)
-
Step 200
200
#D3DADF
oklch(88.4% 0.01 238.5)
-
Step 300
300
#B6C3CC
oklch(81% 0.019 237.8)
-
Step 400
400 (this color)
#99ADBB
oklch(73.7% 0.03 238.4)
-
Step 500
500
#748D9F
oklch(63% 0.039 239.6)
-
Step 600
600
#5D7789
oklch(55.6% 0.041 238.7)
-
Step 700
700
#4C6475
oklch(49.1% 0.04 239.5)
-
Step 800
800
#3F525F
oklch(42.8% 0.032 238.4)
-
Step 900
900
#35444E
oklch(37.8% 0.026 237.6)
-
Step 950
950
#1F282D
oklch(27% 0.016 232.4)
#99ADBB 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) | #A7ACBC | 0.019 |
| Deuteranopia (no green cones) | #A2A8BB | 0.017 |
| Tritanopia (no blue cones) | #90B1B1 | 0.024 |
| Achromatopsia (no color) | #AAAAAA | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99ADBB
#99ADBB
oklch(73.7% 0.03 238.4)
- #B9A698
#B9A698
oklch(73.8% 0.03 58.7)
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 #99ADBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.018
- Dark Gray #A9A9A9 ΔE 0.030
- Cool Grey #95A3A6 ΔE 0.036
- French Gray #ADB5BD ΔE 0.036
- Pewter #96A8A1 ΔE 0.037
- Bluegrey #85A3B2 ΔE 0.040
- Bluey Grey #89A0B0 ΔE 0.044
- Light Grey Blue #9DBCD4 ΔE 0.047
Use #99ADBB 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.