#99AACC
Closest named color: Cool Steel (#97A7B3). oklch(73.7% 0.053 264.2), rgb(153, 170, 204).
Aa
Black text reads best on this color (8.97:1).
About this color
#99AACC is a medium-light, muted blue. In OKLCH its lightness is 74%, its chroma 0.053 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.036 away. Black text reads best on it, at 8.97:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.97:1 |
| White text | 2.33:1 |
Values
| HEX | #99AACC |
| RGB | rgb(153, 170, 204) |
| HSL | hsl(220, 33%, 70%) |
| OKLCH | oklch(73.7% 0.053 264.2) |
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 #99AACC | 2.33:1 | Fails | Lc -51.0 | Large or bold text, headings |
| Black text on #99AACC | 8.97:1 | AAA | Lc 57.9 | Large or bold text, headings |
| #99AACC text on white | 2.33:1 | Fails | Lc 46.1 | Large or bold text, headings |
| #99AACC text on black | 8.97:1 | AAA | Lc -55.9 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D3D9E6
oklch(88.5% 0.019 266)
-
Step 300
300
#B6C1D7
oklch(80.9% 0.033 264.4)
-
Step 400
400 (this color)
#99AACC
oklch(73.7% 0.053 264.2)
-
Step 500
500
#7589B3
oklch(63% 0.068 264.8)
-
Step 600
600
#5D739F
oklch(55.6% 0.074 263.7)
-
Step 700
700
#4D6088
oklch(49.1% 0.069 264.5)
-
Step 800
800
#3F4F6E
oklch(42.8% 0.056 263.2)
-
Step 900
900
#364159
oklch(37.6% 0.044 265.3)
-
Step 950
950
#1F2634
oklch(26.8% 0.028 263.9)
#99AACC 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) | #9FACCE | 0.010 |
| Deuteranopia (no green cones) | #9AA7CB | 0.008 |
| Tritanopia (no blue cones) | #8CB1B5 | 0.048 |
| Achromatopsia (no color) | #A9A9A9 | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #99AACC
#99AACC
oklch(73.7% 0.053 264.2)
- #BAA884
#BAA884
oklch(73.8% 0.053 84.5)
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 #99AACC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.036
- Light Grey Blue #9DBCD4 ΔE 0.048
- Bluegrey #85A3B2 ΔE 0.049
- Bluey Grey #89A0B0 ΔE 0.051
- French Gray #ADB5BD ΔE 0.051
- Dark Gray #A9A9A9 ΔE 0.053
- Cool Grey #95A3A6 ΔE 0.055
- Cool Gray #8D99AE ΔE 0.059
Use #99AACC 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.