#90AACC
Closest named color: Cool Steel (#97A7B3). oklch(73% 0.057 255.3), rgb(144, 170, 204).
Aa
Black text reads best on this color (8.80:1).
About this color
#90AACC is a medium-light, muted blue. In OKLCH its lightness is 73%, its chroma 0.057 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Steel (#97A7B3), ΔE 0.035 away. Black text reads best on it, at 8.80:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Cool Steel (#97A7B3) |
| Black text | 8.80:1 |
| White text | 2.38:1 |
Values
| HEX | #90AACC |
| RGB | rgb(144, 170, 204) |
| HSL | hsl(214, 37%, 68%) |
| OKLCH | oklch(73% 0.057 255.3) |
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 #90AACC | 2.38:1 | Fails | Lc -51.9 | Large or bold text, headings |
| Black text on #90AACC | 8.80:1 | AAA | Lc 57.0 | Large or bold text, headings |
| #90AACC text on white | 2.38:1 | Fails | Lc 47.0 | Large or bold text, headings |
| #90AACC text on black | 8.80:1 | AAA | Lc -55.1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D1DAE6
oklch(88.5% 0.019 255.5)
-
Step 300
300
#B2C2D8
oklch(80.9% 0.036 256.4)
-
Step 400
400 (this color)
#90AACC
oklch(73% 0.057 255.3)
-
Step 500
500
#6B8CB6
oklch(63.2% 0.074 254.8)
-
Step 600
600
#5375A2
oklch(55.6% 0.081 255.7)
-
Step 700
700
#43628A
oklch(49% 0.074 255.2)
-
Step 800
800
#385070
oklch(42.6% 0.061 255.9)
-
Step 900
900
#30435B
oklch(37.8% 0.048 254.6)
-
Step 950
950
#1C2735
oklch(26.9% 0.03 254.7)
#90AACC 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) | #9EABCE | 0.019 |
| Deuteranopia (no green cones) | #97A5CB | 0.015 |
| Tritanopia (no blue cones) | #7FB1B5 | 0.050 |
| Achromatopsia (no color) | #A8A8A8 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #90AACC
#90AACC
oklch(73% 0.057 255.3)
- #BDA380
#BDA380
oklch(73% 0.057 74.9)
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 #90AACC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Steel #97A7B3 ΔE 0.035
- Bluegrey #85A3B2 ΔE 0.042
- Bluey Grey #89A0B0 ΔE 0.045
- Greyblue #77A1B5 ΔE 0.051
- Light Grey Blue #9DBCD4 ΔE 0.052
- Cool Grey #95A3A6 ΔE 0.053
- Cool Gray #8D99AE ΔE 0.055
- Dark Gray #A9A9A9 ΔE 0.058
Use #90AACC 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.