#C9DDF3
Closest named color: Cadet Gray (#CED4DA). oklch(89% 0.037 250.8), rgb(201, 221, 243).
Aa
Black text reads best on this color (15.12:1).
About this color
#C9DDF3 is a light, muted blue. In OKLCH its lightness is 89%, its chroma 0.037 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Gray (#CED4DA), ΔE 0.035 away. Black text reads best on it, at 15.12:1.
| Hue family | Blues |
| Lightness | light (89%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Cadet Gray (#CED4DA) |
| Black text | 15.12:1 |
| White text | 1.38:1 |
Values
| HEX | #C9DDF3 |
| RGB | rgb(201, 221, 243) |
| HSL | hsl(211, 64%, 87%) |
| OKLCH | oklch(89% 0.037 250.8) |
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 #C9DDF3 | 1.38:1 | Fails | Lc -21.6 | Dividers and decoration only |
| Black text on #C9DDF3 | 15.12:1 | AAA | Lc 84.8 | Fine for body text |
| #C9DDF3 text on white | 1.38:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #C9DDF3 text on black | 15.12:1 | AAA | Lc -84.6 | Fine for body text |
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 200.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200 (this color)
#C9DDF3
oklch(89% 0.037 250.8)
-
Step 300
300
#AAC4DF
oklch(81% 0.048 249.4)
-
Step 400
400
#7DA4CF
oklch(70.6% 0.076 251.4)
-
Step 500
500
#5B8DC3
oklch(63.1% 0.098 251.4)
-
Step 600
600
#3F77AF
oklch(55.7% 0.106 250.3)
-
Step 700
700
#316397
oklch(49% 0.1 251.4)
-
Step 800
800
#29517A
oklch(42.6% 0.082 250.8)
-
Step 900
900
#264462
oklch(37.8% 0.063 249.8)
-
Step 950
950
#17283A
oklch(27.1% 0.041 250.8)
#C9DDF3 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) | #D5DDF4 | 0.016 |
| Deuteranopia (no green cones) | #D0D9F3 | 0.013 |
| Tritanopia (no blue cones) | #BEE2E4 | 0.032 |
| Achromatopsia (no color) | #DBDBDB | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C9DDF3
#C9DDF3
oklch(89% 0.037 250.8)
- #EBD7C1
#EBD7C1
oklch(89% 0.037 70)
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 #C9DDF3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Gray #CED4DA ΔE 0.035
- Gainsboro #DCDCDC ΔE 0.038
- Powder Blue #B0E0E6 ΔE 0.038
- Light Blue #ADD8E6 ΔE 0.042
- Pale Silver #D8E2DC ΔE 0.042
- Light Gray #D3D3D3 ΔE 0.044
- Platinum #E0E1DD ΔE 0.045
- Lavender #E6E6FA ΔE 0.047
Use #C9DDF3 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.