#C5F8F9
Closest named color: Duck Egg Blue (#C3FBF4). oklch(94.4% 0.052 197.8), rgb(197, 248, 249).
Aa
Black text reads best on this color (18.16:1).
About this color
#C5F8F9 is a very light, muted teal or cyan. In OKLCH its lightness is 94%, its chroma 0.052 and its hue 198°. Its hue sits on the cool side of the wheel. The nearest named color is Duck Egg Blue (#C3FBF4), ΔE 0.012 away. Black text reads best on it, at 18.16:1.
| Hue family | Teals and cyans |
| Lightness | very light (94%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Duck Egg Blue (#C3FBF4) |
| Black text | 18.16:1 |
| White text | 1.15:1 |
Values
| HEX | #C5F8F9 |
| RGB | rgb(197, 248, 249) |
| HSL | hsl(181, 81%, 87%) |
| OKLCH | oklch(94.4% 0.052 197.8) |
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 #C5F8F9 | 1.15:1 | Fails | Lc -8.6 | Not readable |
| Black text on #C5F8F9 | 18.16:1 | AAA | Lc 96.2 | Preferred for body text |
| #C5F8F9 text on white | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #C5F8F9 text on black | 18.16:1 | AAA | Lc -97.1 | 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
#EFF7F7
oklch(97% 0.008 197)
-
Step 100
100 (this color)
#C5F8F9
oklch(94.4% 0.052 197.8)
-
Step 200
200
#BEE1E2
oklch(88.5% 0.037 198.6)
-
Step 300
300
#8DCED0
oklch(80.9% 0.066 198.4)
-
Step 400
400
#37B5B8
oklch(70.8% 0.107 197.4)
-
Step 500
500
#009DA1
oklch(63.2% 0.107 198)
-
Step 600
600
#008487
oklch(55.6% 0.095 197.6)
-
Step 700
700
#006F72
oklch(49.2% 0.084 198.1)
-
Step 800
800
#005B5D
oklch(42.7% 0.073 197.4)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#C5F8F9 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) | #F1F3F9 | 0.054 |
| Deuteranopia (no green cones) | #E7EBF9 | 0.051 |
| Tritanopia (no blue cones) | #B5FCF8 | 0.020 |
| Achromatopsia (no color) | #EEEEEE | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C5F8F9
#C5F8F9
oklch(94.4% 0.052 197.8)
- #FFE6E6
#FFE6E6
oklch(94.5% 0.027 17.6)
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 #C5F8F9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Duck Egg Blue #C3FBF4 ΔE 0.012
- Pale Sky Blue #BDF6FE ΔE 0.013
- Light Light Blue #CAFFFB ΔE 0.020
- Eggshell Blue #C4FFF7 ΔE 0.020
- Pale Blue #D0FEFE ΔE 0.021
- Pale Cyan #B7FFFA ΔE 0.022
- Diamond #B9F2FF ΔE 0.025
- Really Light Blue #D4FFFF ΔE 0.027
Use #C5F8F9 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.