#8399A3
Closest named color: Cool Gray (#8D99AE). oklch(66.9% 0.029 227), rgb(131, 153, 163).
Aa
Black text reads best on this color (7.05:1).
About this color
#8399A3 is a medium-light close to neutral grey. In OKLCH its lightness is 67%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Cool Gray (#8D99AE), ΔE 0.022 away. Black text reads best on it, at 7.05:1.
| Hue family | Neutrals |
| Lightness | medium-light (67%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.05:1 |
| White text | 2.97:1 |
Values
| HEX | #8399A3 |
| RGB | rgb(131, 153, 163) |
| HSL | hsl(199, 15%, 58%) |
| OKLCH | oklch(66.9% 0.029 227) |
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 #8399A3 | 2.97:1 | Fails | Lc -61.7 | Content text, not long reading |
| Black text on #8399A3 | 7.05:1 | AAA | Lc 47.7 | Large or bold text, headings |
| #8399A3 text on white | 2.97:1 | Fails | Lc 56.4 | Large or bold text, headings |
| #8399A3 text on black | 7.05:1 | AAA | Lc -45.4 | 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
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D3DBDE
oklch(88.6% 0.01 222.1)
-
Step 300
300
#B5C3CA
oklch(80.9% 0.018 229.1)
-
Step 400
400 (this color)
#8399A3
oklch(66.9% 0.029 227)
-
Step 500
500
#728E9B
oklch(63% 0.037 227.8)
-
Step 600
600
#5A7886
oklch(55.5% 0.041 228.3)
-
Step 700
700
#4A6571
oklch(49% 0.037 227.1)
-
Step 800
800
#3D535C
oklch(42.8% 0.031 225)
-
Step 900
900
#34444C
oklch(37.6% 0.025 229.8)
-
Step 950
950
#1F282C
oklch(27% 0.015 226.6)
#8399A3 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) | #9498A4 | 0.023 |
| Deuteranopia (no green cones) | #8F94A3 | 0.020 |
| Tritanopia (no blue cones) | #7A9C9C | 0.020 |
| Achromatopsia (no color) | #959595 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8399A3
#8399A3
oklch(66.9% 0.029 227)
- #A59086
#A59086
oklch(66.9% 0.029 47.1)
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 #8399A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.022
- Bluey Grey #89A0B0 ΔE 0.026
- Greyblue #77A1B5 ΔE 0.030
- Bluegrey #85A3B2 ΔE 0.031
- Cool Grey #95A3A6 ΔE 0.039
- Blue Grey #758DA3 ΔE 0.041
- Silver Lake Blue #778DA9 ΔE 0.043
- Cadet Blue #5F9EA0 ΔE 0.043
Use #8399A3 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.