#999EB5
Closest named color: Cool Gray (#8D99AE). oklch(70.3% 0.034 275.8), rgb(153, 158, 181).
Aa
Black text reads best on this color (7.91:1).
About this color
#999EB5 is a medium-light, muted blue. In OKLCH its lightness is 70%, its chroma 0.034 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.024 away. Black text reads best on it, at 7.91:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 7.91:1 |
| White text | 2.65:1 |
Values
| HEX | #999EB5 |
| RGB | rgb(153, 158, 181) |
| HSL | hsl(229, 16%, 65%) |
| OKLCH | oklch(70.3% 0.034 275.8) |
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 #999EB5 | 2.65:1 | Fails | Lc -56.9 | Large or bold text, headings |
| Black text on #999EB5 | 7.91:1 | AAA | Lc 52.4 | Large or bold text, headings |
| #999EB5 text on white | 2.65:1 | Fails | Lc 51.7 | Large or bold text, headings |
| #999EB5 text on black | 7.91:1 | AAA | Lc -50.2 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#E8E9EE
oklch(93.5% 0.007 277.2)
-
Step 200
200
#D7D9E1
oklch(88.6% 0.011 274.9)
-
Step 300
300
#BCC0CF
oklch(80.9% 0.021 274)
-
Step 400
400 (this color)
#999EB5
oklch(70.3% 0.034 275.8)
-
Step 500
500
#8288A4
oklch(63.2% 0.043 275.6)
-
Step 600
600
#6B718F
oklch(55.5% 0.047 275.9)
-
Step 700
700
#595F7A
oklch(49.1% 0.044 274.9)
-
Step 800
800
#494E63
oklch(42.8% 0.035 274.4)
-
Step 900
900
#3D4151
oklch(37.8% 0.028 274)
-
Step 950
950
#24262F
oklch(27% 0.017 275.4)
#999EB5 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) | #98A0B6 | 0.005 |
| Deuteranopia (no green cones) | #969EB4 | 0.005 |
| Tritanopia (no blue cones) | #93A2A5 | 0.031 |
| Achromatopsia (no color) | #9F9F9F | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999EB5
#999EB5
oklch(70.3% 0.034 275.8)
- #A5A088
#A5A088
oklch(70.3% 0.034 97.5)
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 #999EB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.024
- Bluey Grey #89A0B0 ΔE 0.024
- Cool Steel #97A7B3 ΔE 0.026
- Bluegrey #85A3B2 ΔE 0.030
- Cool Grey #95A3A6 ΔE 0.031
- Greyblue #77A1B5 ΔE 0.043
- Dark Gray #A9A9A9 ΔE 0.047
- Pewter #96A8A1 ΔE 0.047
Use #999EB5 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.