#999EC5
Closest named color: Cool Gray (#8D99AE). oklch(70.9% 0.057 279.1), rgb(153, 158, 197).
Aa
Black text reads best on this color (8.05:1).
About this color
#999EC5 is a medium-light, muted blue. In OKLCH its lightness is 71%, its chroma 0.057 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.039 away. Black text reads best on it, at 8.05:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 8.05:1 |
| White text | 2.60:1 |
Values
| HEX | #999EC5 |
| RGB | rgb(153, 158, 197) |
| HSL | hsl(233, 28%, 69%) |
| OKLCH | oklch(70.9% 0.057 279.1) |
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 #999EC5 | 2.60:1 | Fails | Lc -56.1 | Large or bold text, headings |
| Black text on #999EC5 | 8.05:1 | AAA | Lc 53.1 | Large or bold text, headings |
| #999EC5 text on white | 2.60:1 | Fails | Lc 50.9 | Large or bold text, headings |
| #999EC5 text on black | 8.05:1 | AAA | Lc -51.0 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E8E9F1
oklch(93.6% 0.011 280.5)
-
Step 200
200
#D6D8E6
oklch(88.5% 0.019 279.5)
-
Step 300
300
#BBBFD8
oklch(80.9% 0.035 278.4)
-
Step 400
400 (this color)
#999EC5
oklch(70.9% 0.057 279.1)
-
Step 500
500
#8085B5
oklch(63.1% 0.072 279.5)
-
Step 600
600
#696EA1
oklch(55.5% 0.079 279.2)
-
Step 700
700
#585C8A
oklch(49.1% 0.074 279.5)
-
Step 800
800
#484B70
oklch(42.6% 0.061 279.9)
-
Step 900
900
#3C3F5B
oklch(37.7% 0.048 279.1)
-
Step 950
950
#232535
oklch(27% 0.03 278.7)
#999EC5 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) | #94A2C7 | 0.012 |
| Deuteranopia (no green cones) | #919FC4 | 0.011 |
| Tritanopia (no blue cones) | #8FA5AB | 0.051 |
| Achromatopsia (no color) | #A0A0A0 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999EC5
#999EC5
oklch(70.9% 0.057 279.1)
- #AAA279
#AAA279
oklch(70.9% 0.057 98.4)
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 #999EC5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.039
- Bluey Grey #89A0B0 ΔE 0.041
- Cool Steel #97A7B3 ΔE 0.042
- Bluegrey #85A3B2 ΔE 0.045
- Greyblue #77A1B5 ΔE 0.053
- Cool Grey #95A3A6 ΔE 0.053
- Dark Gray #A9A9A9 ΔE 0.063
- Pale Purple #B790D4 ΔE 0.064
Use #999EC5 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.