#C4EFF9
Closest named color: Diamond (#B9F2FF). oklch(92.5% 0.046 213.4), rgb(196, 239, 249).
Aa
Black text reads best on this color (17.06:1).
About this color
#C4EFF9 is a very light, muted teal or cyan. In OKLCH its lightness is 93%, its chroma 0.046 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Diamond (#B9F2FF), ΔE 0.014 away. Black text reads best on it, at 17.06:1.
| Hue family | Teals and cyans |
| Lightness | very light (93%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Diamond (#B9F2FF) |
| Black text | 17.06:1 |
| White text | 1.23:1 |
Values
| HEX | #C4EFF9 |
| RGB | rgb(196, 239, 249) |
| HSL | hsl(191, 82%, 87%) |
| OKLCH | oklch(92.5% 0.046 213.4) |
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 #C4EFF9 | 1.23:1 | Fails | Lc -13.2 | Not readable |
| Black text on #C4EFF9 | 17.06:1 | AAA | Lc 92.2 | Preferred for body text |
| #C4EFF9 text on white | 1.23:1 | Fails | Lc 11.4 | Not readable |
| #C4EFF9 text on black | 17.06:1 | AAA | Lc -92.6 | Preferred 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 100.
-
Step 50
50
#F0F7F9
oklch(97.1% 0.008 216.6)
-
Step 100
100 (this color)
#C4EFF9
oklch(92.5% 0.046 213.4)
-
Step 200
200
#C1DFE6
oklch(88.4% 0.033 213.4)
-
Step 300
300
#94CBD8
oklch(80.8% 0.06 213.9)
-
Step 400
400
#4EB0C4
oklch(70.7% 0.095 213.2)
-
Step 500
500
#009AB2
oklch(63.1% 0.111 213.9)
-
Step 600
600
#008296
oklch(55.7% 0.098 213.4)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#C4EFF9 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) | #E7ECFA | 0.043 |
| Deuteranopia (no green cones) | #DEE5F9 | 0.039 |
| Tritanopia (no blue cones) | #B4F3F2 | 0.024 |
| Achromatopsia (no color) | #E8E8E8 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C4EFF9
#C4EFF9
oklch(92.5% 0.046 213.4)
- #FFDED6
#FFDED6
oklch(92.6% 0.038 33.8)
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 #C4EFF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Diamond #B9F2FF ΔE 0.014
- Pale Sky Blue #BDF6FE ΔE 0.018
- Pale Turquoise #AFEEEE ΔE 0.030
- Duck Egg Blue #C3FBF4 ΔE 0.035
- Pale Blue #D0FEFE ΔE 0.042
- Pale Cyan #B7FFFA ΔE 0.043
- Light Light Blue #CAFFFB ΔE 0.043
- Eggshell Blue #C4FFF7 ΔE 0.044
Use #C4EFF9 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.