#999ECB
Closest named color: Cool Gray (#8D99AE). oklch(71.1% 0.066 279.6), rgb(153, 158, 203).
Aa
Black text reads best on this color (8.10:1).
About this color
#999ECB is a medium-light, muted blue. In OKLCH its lightness is 71%, its chroma 0.066 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Gray (#8D99AE), ΔE 0.047 away. Black text reads best on it, at 8.10:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Cool Gray (#8D99AE) |
| Black text | 8.10:1 |
| White text | 2.59:1 |
Values
| HEX | #999ECB |
| RGB | rgb(153, 158, 203) |
| HSL | hsl(234, 32%, 70%) |
| OKLCH | oklch(71.1% 0.066 279.6) |
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 #999ECB | 2.59:1 | Fails | Lc -55.7 | Large or bold text, headings |
| Black text on #999ECB | 8.10:1 | AAA | Lc 53.4 | Large or bold text, headings |
| #999ECB text on white | 2.59:1 | Fails | Lc 50.6 | Large or bold text, headings |
| #999ECB text on black | 8.10:1 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D6D8E8
oklch(88.5% 0.022 280.3)
-
Step 300
300
#BBBEDB
oklch(80.8% 0.041 280.8)
-
Step 400
400 (this color)
#999ECB
oklch(71.1% 0.066 279.6)
-
Step 500
500
#7F84BC
oklch(63.1% 0.084 279.8)
-
Step 600
600
#686DA8
oklch(55.6% 0.091 279.3)
-
Step 700
700
#575B90
oklch(49.1% 0.085 279.5)
-
Step 800
800
#474A75
oklch(42.6% 0.071 279.9)
-
Step 900
900
#3C3E5E
oklch(37.7% 0.055 280.7)
-
Step 950
950
#232537
oklch(27.1% 0.034 279)
#999ECB 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) | #92A3CD | 0.015 |
| Deuteranopia (no green cones) | #8F9FCA | 0.014 |
| Tritanopia (no blue cones) | #8DA6AD | 0.059 |
| Achromatopsia (no color) | #A1A1A1 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #999ECB
#999ECB
oklch(71.1% 0.066 279.6)
- #ABA373
#ABA373
oklch(71% 0.066 99.8)
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 #999ECB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Gray #8D99AE ΔE 0.047
- Bluey Grey #89A0B0 ΔE 0.049
- Cool Steel #97A7B3 ΔE 0.050
- Bluegrey #85A3B2 ΔE 0.052
- Greyblue #77A1B5 ΔE 0.058
- Pale Purple #B790D4 ΔE 0.059
- Cool Grey #95A3A6 ΔE 0.062
- Dark Gray #A9A9A9 ΔE 0.070
Use #999ECB 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.