#999EB8
Closest named color: Cool Gray (#8D99AE). oklch(70.4% 0.038 276.8), rgb(153, 158, 184).
Aa
Black text reads best on this color (7.93:1).
About this color
#999EB8 is a medium-light, muted blue. In OKLCH its lightness is 70%, its chroma 0.038 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.026 away. Black text reads best on it, at 7.93:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.93:1 |
| White text | 2.64:1 |
Values
| HEX | #999EB8 |
| RGB | rgb(153, 158, 184) |
| HSL | hsl(230, 18%, 66%) |
| OKLCH | oklch(70.4% 0.038 276.8) |
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 #999EB8 | 2.64:1 | Fails | Lc -56.7 | Large or bold text, headings |
| Black text on #999EB8 | 7.93:1 | AAA | Lc 52.5 | Large or bold text, headings |
| #999EB8 text on white | 2.64:1 | Fails | Lc 51.5 | Large or bold text, headings |
| #999EB8 text on black | 7.93:1 | AAA | Lc -50.4 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8E9EF
oklch(93.5% 0.008 278.6)
-
Step 200
200
#D6D8E2
oklch(88.4% 0.014 277)
-
Step 300
300
#BCC0D0
oklch(81% 0.023 274.7)
-
Step 400
400 (this color)
#999EB8
oklch(70.4% 0.038 276.8)
-
Step 500
500
#8187A8
oklch(63% 0.05 276.8)
-
Step 600
600
#6B7193
oklch(55.7% 0.053 276.7)
-
Step 700
700
#595E7D
oklch(49% 0.05 277.3)
-
Step 800
800
#494D66
oklch(42.7% 0.042 277.4)
-
Step 900
900
#3D4053
oklch(37.7% 0.033 277.7)
-
Step 950
950
#242630
oklch(27.1% 0.019 276.2)
#999EB8 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) | #97A0B9 | 0.006 |
| Deuteranopia (no green cones) | #959EB7 | 0.006 |
| Tritanopia (no blue cones) | #92A3A6 | 0.036 |
| Achromatopsia (no color) | #9F9F9F | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999EB8
#999EB8
oklch(70.4% 0.038 276.8)
- #A6A085
#A6A085
oklch(70.4% 0.038 96.9)
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 #999EB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.026
- Bluey Grey #89A0B0 ΔE 0.026
- Cool Steel #97A7B3 ΔE 0.028
- Bluegrey #85A3B2 ΔE 0.032
- Cool Grey #95A3A6 ΔE 0.035
- Greyblue #77A1B5 ΔE 0.044
- Dark Gray #A9A9A9 ΔE 0.049
- Pewter #96A8A1 ΔE 0.051
Use #999EB8 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.