#8399B5
Closest named color: Cool Gray (#8D99AE). oklch(67.6% 0.049 254.6), rgb(131, 153, 181).
Aa
Black text reads best on this color (7.18:1).
About this color
#8399B5 is a medium-light, muted blue. In OKLCH its lightness is 68%, its chroma 0.049 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.016 away. Black text reads best on it, at 7.18:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.18:1 |
| White text | 2.92:1 |
Values
| HEX | #8399B5 |
| RGB | rgb(131, 153, 181) |
| HSL | hsl(214, 25%, 61%) |
| OKLCH | oklch(67.6% 0.049 254.6) |
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 #8399B5 | 2.92:1 | Fails | Lc -60.9 | Content text, not long reading |
| Black text on #8399B5 | 7.18:1 | AAA | Lc 48.4 | Large or bold text, headings |
| #8399B5 text on white | 2.92:1 | Fails | Lc 55.6 | Large or bold text, headings |
| #8399B5 text on black | 7.18:1 | AAA | Lc -46.2 | 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
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE4
oklch(88.5% 0.016 253.9)
-
Step 300
300
#B4C2D4
oklch(80.9% 0.03 254.7)
-
Step 400
400 (this color)
#8399B5
oklch(67.6% 0.049 254.6)
-
Step 500
500
#708CAF
oklch(63.2% 0.062 254.3)
-
Step 600
600
#58759A
oklch(55.5% 0.067 254.8)
-
Step 700
700
#486284
oklch(49% 0.063 255.4)
-
Step 800
800
#3B506B
oklch(42.6% 0.052 255)
-
Step 900
900
#334357
oklch(37.8% 0.04 254.3)
-
Step 950
950
#1E2733
oklch(27% 0.026 255.7)
#8399B5 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) | #8F9AB6 | 0.017 |
| Deuteranopia (no green cones) | #8A95B4 | 0.013 |
| Tritanopia (no blue cones) | #759FA2 | 0.042 |
| Achromatopsia (no color) | #979797 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #8399B5
#8399B5
oklch(67.6% 0.049 254.6)
- #A99376
#A99376
oklch(67.5% 0.048 74.5)
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 #8399B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.016
- Bluey Grey #89A0B0 ΔE 0.025
- Greyblue #77A1B5 ΔE 0.025
- Bluegrey #85A3B2 ΔE 0.030
- Silver Lake Blue #778DA9 ΔE 0.039
- Blue Grey #758DA3 ΔE 0.044
- Cool Grey #95A3A6 ΔE 0.048
- Cool Steel #97A7B3 ΔE 0.051
Use #8399B5 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.