#999FC4
Closest named color: Cool Gray (#8D99AE). oklch(71.1% 0.054 277.7), rgb(153, 159, 196).
Aa
Black text reads best on this color (8.11:1).
About this color
#999FC4 is a medium-light, muted blue. In OKLCH its lightness is 71%, its chroma 0.054 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.038 away. Black text reads best on it, at 8.11:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 8.11:1 |
| White text | 2.58:1 |
Values
| HEX | #999FC4 |
| RGB | rgb(153, 159, 196) |
| HSL | hsl(232, 27%, 68%) |
| OKLCH | oklch(71.1% 0.054 277.7) |
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 #999FC4 | 2.58:1 | Fails | Lc -55.7 | Large or bold text, headings |
| Black text on #999FC4 | 8.11:1 | AAA | Lc 53.4 | Large or bold text, headings |
| #999FC4 text on white | 2.58:1 | Fails | Lc 50.6 | Large or bold text, headings |
| #999FC4 text on black | 8.11:1 | AAA | Lc -51.3 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
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
#BBBFD7
oklch(80.9% 0.034 278.1)
-
Step 400
400 (this color)
#999FC4
oklch(71.1% 0.054 277.7)
-
Step 500
500
#7F86B4
oklch(63.2% 0.07 277.5)
-
Step 600
600
#686F9F
oklch(55.5% 0.075 277.3)
-
Step 700
700
#575D88
oklch(49.1% 0.069 277.4)
-
Step 800
800
#474C6F
oklch(42.7% 0.058 277.4)
-
Step 900
900
#3C3F5A
oklch(37.7% 0.046 279)
-
Step 950
950
#232534
oklch(26.9% 0.028 278.4)
#999FC4 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) | #95A3C6 | 0.011 |
| Deuteranopia (no green cones) | #929FC3 | 0.010 |
| Tritanopia (no blue cones) | #8FA6AB | 0.050 |
| Achromatopsia (no color) | #A1A1A1 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999FC4
#999FC4
oklch(71.1% 0.054 277.7)
- #ABA27C
#ABA27C
oklch(71% 0.053 96.3)
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 #999FC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.038
- Cool Steel #97A7B3 ΔE 0.039
- Bluey Grey #89A0B0 ΔE 0.039
- Bluegrey #85A3B2 ΔE 0.042
- Cool Grey #95A3A6 ΔE 0.050
- Greyblue #77A1B5 ΔE 0.051
- Dark Gray #A9A9A9 ΔE 0.060
- Pewter #96A8A1 ΔE 0.065
Use #999FC4 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.