#99ACBF
Closest named color: Cool Steel (#97A7B3). oklch(73.6% 0.035 248.3), rgb(153, 172, 191).
Aa
Black text reads best on this color (9.00:1).
About this color
#99ACBF is a medium-light, muted blue. In OKLCH its lightness is 74%, its chroma 0.035 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.019 away. Black text reads best on it, at 9.00:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 9.00:1 |
| White text | 2.33:1 |
Values
| HEX | #99ACBF |
| RGB | rgb(153, 172, 191) |
| HSL | hsl(210, 23%, 67%) |
| OKLCH | oklch(73.6% 0.035 248.3) |
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 #99ACBF | 2.33:1 | Fails | Lc -50.9 | Large or bold text, headings |
| Black text on #99ACBF | 9.00:1 | AAA | Lc 58.0 | Large or bold text, headings |
| #99ACBF text on white | 2.33:1 | Fails | Lc 46.0 | Large or bold text, headings |
| #99ACBF text on black | 9.00:1 | AAA | Lc -56.1 | 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
#E7EAEE
oklch(93.6% 0.006 255.5)
-
Step 200
200
#D3DAE1
oklch(88.5% 0.012 248)
-
Step 300
300
#B6C2CE
oklch(80.8% 0.022 248.1)
-
Step 400
400 (this color)
#99ACBF
oklch(73.6% 0.035 248.3)
-
Step 500
500
#758CA4
oklch(63.1% 0.045 249.6)
-
Step 600
600
#5D768F
oklch(55.6% 0.049 248.7)
-
Step 700
700
#4D6379
oklch(49.1% 0.044 248.7)
-
Step 800
800
#3F5163
oklch(42.7% 0.038 248.7)
-
Step 900
900
#364351
oklch(37.7% 0.029 250.5)
-
Step 950
950
#1F272F
oklch(26.9% 0.019 248.5)
#99ACBF 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) | #A5ACC0 | 0.016 |
| Deuteranopia (no green cones) | #A0A8BF | 0.014 |
| Tritanopia (no blue cones) | #8FB0B2 | 0.029 |
| Achromatopsia (no color) | #AAAAAA | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99ACBF
#99ACBF
oklch(73.6% 0.035 248.3)
- #B9A693
#B9A693
oklch(73.6% 0.035 67.2)
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 #99ACBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.019
- Dark Gray #A9A9A9 ΔE 0.035
- Cool Grey #95A3A6 ΔE 0.039
- French Gray #ADB5BD ΔE 0.039
- Bluegrey #85A3B2 ΔE 0.040
- Pewter #96A8A1 ΔE 0.043
- Bluey Grey #89A0B0 ΔE 0.043
- Light Grey Blue #9DBCD4 ΔE 0.046
Use #99ACBF 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.