#8399AA
Closest named color: Cool Gray (#8D99AE). oklch(67.2% 0.035 241.3), rgb(131, 153, 170).
Aa
Black text reads best on this color (7.10:1).
About this color
#8399AA is a medium-light, muted blue. In OKLCH its lightness is 67%, its chroma 0.035 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.015 away. Black text reads best on it, at 7.10:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.10:1 |
| White text | 2.95:1 |
Values
| HEX | #8399AA |
| RGB | rgb(131, 153, 170) |
| HSL | hsl(206, 19%, 59%) |
| OKLCH | oklch(67.2% 0.035 241.3) |
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 #8399AA | 2.95:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #8399AA | 7.10:1 | AAA | Lc 47.9 | Large or bold text, headings |
| #8399AA text on white | 2.95:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #8399AA text on black | 7.10:1 | AAA | Lc -45.7 | 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
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE1
oklch(88.4% 0.013 244.3)
-
Step 300
300
#B5C3CE
oklch(81% 0.022 241.4)
-
Step 400
400 (this color)
#8399AA
oklch(67.2% 0.035 241.3)
-
Step 500
500
#718DA3
oklch(63% 0.046 242.1)
-
Step 600
600
#59778E
oklch(55.5% 0.05 241.8)
-
Step 700
700
#496479
oklch(49% 0.047 242.2)
-
Step 800
800
#3C5262
oklch(42.7% 0.038 240.3)
-
Step 900
900
#344450
oklch(37.8% 0.029 240.9)
-
Step 950
950
#1E282F
oklch(27% 0.019 238.9)
#8399AA 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) | #9299AB | 0.020 |
| Deuteranopia (no green cones) | #8D94AA | 0.018 |
| Tritanopia (no blue cones) | #789D9E | 0.028 |
| Achromatopsia (no color) | #969696 | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8399AA
#8399AA
oklch(67.2% 0.035 241.3)
- #A69180
#A69180
oklch(67.1% 0.035 61.2)
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 #8399AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.015
- Bluey Grey #89A0B0 ΔE 0.022
- Greyblue #77A1B5 ΔE 0.025
- Bluegrey #85A3B2 ΔE 0.028
- Silver Lake Blue #778DA9 ΔE 0.039
- Blue Grey #758DA3 ΔE 0.040
- Cool Grey #95A3A6 ΔE 0.041
- Cadet Blue #5F9EA0 ΔE 0.048
Use #8399AA 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.