#C9DDEF
Closest named color: Cadet Gray (#CED4DA). oklch(88.8% 0.033 245.3), rgb(201, 221, 239).
Aa
Black text reads best on this color (15.07:1).
About this color
#C9DDEF is a light, muted blue. In OKLCH its lightness is 89%, its chroma 0.033 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Gray (#CED4DA), ΔE 0.031 away. Black text reads best on it, at 15.07:1.
| Hue family | Blues |
| Lightness | light (89%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Cadet Gray (#CED4DA) |
| Black text | 15.07:1 |
| White text | 1.39:1 |
Values
| HEX | #C9DDEF |
| RGB | rgb(201, 221, 239) |
| HSL | hsl(208, 54%, 86%) |
| OKLCH | oklch(88.8% 0.033 245.3) |
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 #C9DDEF | 1.39:1 | Fails | Lc -21.8 | Dividers and decoration only |
| Black text on #C9DDEF | 15.07:1 | AAA | Lc 84.6 | Fine for body text |
| #C9DDEF text on white | 1.39:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #C9DDEF text on black | 15.07:1 | AAA | Lc -84.4 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200 (this color)
#C9DDEF
oklch(88.8% 0.033 245.3)
-
Step 300
300
#ABC4DB
oklch(80.9% 0.042 246.1)
-
Step 400
400
#7DA5C8
oklch(70.6% 0.067 245.4)
-
Step 500
500
#5B8FBB
oklch(63.1% 0.087 245.3)
-
Step 600
600
#4078A7
oklch(55.5% 0.094 245.9)
-
Step 700
700
#31658F
oklch(49.1% 0.088 245.3)
-
Step 800
800
#2A5374
oklch(42.8% 0.072 244.9)
-
Step 900
900
#27455E
oklch(37.9% 0.056 245.2)
-
Step 950
950
#172837
oklch(26.9% 0.036 246.3)
#C9DDEF 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) | #D6DDF0 | 0.017 |
| Deuteranopia (no green cones) | #D1D9EF | 0.014 |
| Tritanopia (no blue cones) | #BFE1E3 | 0.026 |
| Achromatopsia (no color) | #DADADA | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C9DDEF
#C9DDEF
oklch(88.8% 0.033 245.3)
- #EAD6C4
#EAD6C4
oklch(88.8% 0.033 64.4)
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 #C9DDEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Gray #CED4DA ΔE 0.031
- Gainsboro #DCDCDC ΔE 0.033
- Powder Blue #B0E0E6 ΔE 0.035
- Pale Silver #D8E2DC ΔE 0.038
- Light Gray #D3D3D3 ΔE 0.039
- Light Blue #ADD8E6 ΔE 0.040
- Platinum #E0E1DD ΔE 0.041
- Lavender #E6E6FA ΔE 0.048
Use #C9DDEF 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.