#8399AB
Closest named color: Cool Gray (#8D99AE). oklch(67.2% 0.037 242.9), rgb(131, 153, 171).
Aa
Black text reads best on this color (7.10:1).
About this color
#8399AB is a medium-light, muted blue. In OKLCH its lightness is 67%, its chroma 0.037 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.014 away. Black text reads best on it, at 7.10:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.10:1 |
| White text | 2.95:1 |
Values
| HEX | #8399AB |
| RGB | rgb(131, 153, 171) |
| HSL | hsl(207, 19%, 59%) |
| OKLCH | oklch(67.2% 0.037 242.9) |
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 #8399AB | 2.95:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #8399AB | 7.10:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #8399AB text on white | 2.95:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #8399AB 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
#B4C3CE
oklch(80.9% 0.023 239.5)
-
Step 400
400 (this color)
#8399AB
oklch(67.2% 0.037 242.9)
-
Step 500
500
#718DA4
oklch(63% 0.047 243.4)
-
Step 600
600
#59778F
oklch(55.5% 0.051 242.9)
-
Step 700
700
#49647A
oklch(49.1% 0.048 243.5)
-
Step 800
800
#3C5263
oklch(42.7% 0.039 242)
-
Step 900
900
#344451
oklch(37.8% 0.03 243.1)
-
Step 950
950
#1E282F
oklch(27% 0.019 238.9)
#8399AB 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) | #9299AC | 0.020 |
| Deuteranopia (no green cones) | #8D94AB | 0.018 |
| Tritanopia (no blue cones) | #789D9F | 0.028 |
| Achromatopsia (no color) | #969696 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8399AB
#8399AB
oklch(67.2% 0.037 242.9)
- #A7917F
#A7917F
oklch(67.1% 0.037 61.4)
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 #8399AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.014
- 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 0.049
Use #8399AB 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.