#999FCF
Closest named color: Cool Gray (#8D99AE). oklch(71.5% 0.07 278.9), rgb(153, 159, 207).
Aa
Black text reads best on this color (8.21:1).
About this color
#999FCF is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.070 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.052 away. Black text reads best on it, at 8.21:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 8.21:1 |
| White text | 2.55:1 |
Values
| HEX | #999FCF |
| RGB | rgb(153, 159, 207) |
| HSL | hsl(233, 36%, 71%) |
| OKLCH | oklch(71.5% 0.07 278.9) |
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 #999FCF | 2.55:1 | Fails | Lc -55.2 | Large or bold text, headings |
| Black text on #999FCF | 8.21:1 | AAA | Lc 54.0 | Large or bold text, headings |
| #999FCF text on white | 2.55:1 | Fails | Lc 50.0 | Large or bold text, headings |
| #999FCF text on black | 8.21:1 | AAA | Lc -51.9 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D5D8EA
oklch(88.5% 0.025 278.3)
-
Step 300
300
#BABEDD
oklch(80.8% 0.044 279.6)
-
Step 400
400 (this color)
#999FCF
oklch(71.5% 0.07 278.9)
-
Step 500
500
#7E84BF
oklch(63.2% 0.089 279.1)
-
Step 600
600
#676DAC
oklch(55.7% 0.098 278.6)
-
Step 700
700
#565A93
oklch(49% 0.091 279.4)
-
Step 800
800
#464A77
oklch(42.6% 0.075 278.9)
-
Step 900
900
#3B3E60
oklch(37.7% 0.058 279.3)
-
Step 950
950
#222538
oklch(27.1% 0.036 276.8)
#999FCF 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) | #92A4D1 | 0.015 |
| Deuteranopia (no green cones) | #8FA0CE | 0.014 |
| Tritanopia (no blue cones) | #8CA8AF | 0.063 |
| Achromatopsia (no color) | #A2A2A2 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999FCF
#999FCF
oklch(71.5% 0.07 278.9)
- #AEA471
#AEA471
oklch(71.5% 0.07 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 #999FCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.052
- Cool Steel #97A7B3 ΔE 0.053
- Bluey Grey #89A0B0 ΔE 0.054
- Bluegrey #85A3B2 ΔE 0.056
- Pale Purple #B790D4 ΔE 0.058
- Greyblue #77A1B5 ΔE 0.062
- Cool Grey #95A3A6 ΔE 0.066
- Perrywinkle #8F8CE7 ΔE 0.071
Use #999FCF 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.