#8399AF
Closest named color: Cool Gray (#8D99AE). oklch(67.3% 0.041 248.4), rgb(131, 153, 175).
Aa
Black text reads best on this color (7.14:1).
About this color
#8399AF is a medium-light, muted blue. In OKLCH its lightness is 67%, its chroma 0.041 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.013 away. Black text reads best on it, at 7.14:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | muted (0.041) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.14:1 |
| White text | 2.94:1 |
Values
| HEX | #8399AF |
| RGB | rgb(131, 153, 175) |
| HSL | hsl(210, 22%, 60%) |
| OKLCH | oklch(67.3% 0.041 248.4) |
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 #8399AF | 2.94:1 | Fails | Lc -61.2 | Content text, not long reading |
| Black text on #8399AF | 7.14:1 | AAA | Lc 48.2 | Large or bold text, headings |
| #8399AF text on white | 2.94:1 | Fails | Lc 55.9 | Large or bold text, headings |
| #8399AF text on black | 7.14:1 | AAA | Lc -45.9 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B4C2D1
oklch(80.8% 0.026 250)
-
Step 400
400 (this color)
#8399AF
oklch(67.3% 0.041 248.4)
-
Step 500
500
#718DA8
oklch(63.2% 0.052 247.7)
-
Step 600
600
#597694
oklch(55.5% 0.058 249.8)
-
Step 700
700
#49647E
oklch(49.2% 0.053 248)
-
Step 800
800
#3C5166
oklch(42.6% 0.044 248.9)
-
Step 900
900
#334353
oklch(37.6% 0.034 248.8)
-
Step 950
950
#1E2731
oklch(26.9% 0.023 251.3)
#8399AF 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) | #9199B0 | 0.019 |
| Deuteranopia (no green cones) | #8B94AF | 0.017 |
| Tritanopia (no blue cones) | #779EA0 | 0.034 |
| Achromatopsia (no color) | #969696 | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8399AF
#8399AF
oklch(67.3% 0.041 248.4)
- #A8927C
#A8927C
oklch(67.4% 0.041 67)
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 #8399AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.013
- Bluey Grey #89A0B0 ΔE 0.022
- Greyblue #77A1B5 ΔE 0.024
- Bluegrey #85A3B2 ΔE 0.028
- Silver Lake Blue #778DA9 ΔE 0.038
- Blue Grey #758DA3 ΔE 0.041
- Cool Grey #95A3A6 ΔE 0.043
- Cool Steel #97A7B3 ΔE 0.049
Use #8399AF 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.