#4099AB
Closest named color: Cadet Blue (#5F9EA0). oklch(63.7% 0.088 213.2), rgb(64, 153, 171).
Aa
Black text reads best on this color (6.36:1).
About this color
#4099AB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.088 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.037 away. Black text reads best on it, at 6.36:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.36:1 |
| White text | 3.30:1 |
Values
| HEX | #4099AB |
| RGB | rgb(64, 153, 171) |
| HSL | hsl(190, 46%, 46%) |
| OKLCH | oklch(63.7% 0.088 213.2) |
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 #4099AB | 3.30:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #4099AB | 6.36:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #4099AB text on white | 3.30:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #4099AB text on black | 6.36:1 | AA | Lc -41.6 | Non-text elements, placeholder 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 500.
-
Step 50
50
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE3
oklch(88.6% 0.024 212.9)
-
Step 300
300
#A2C8D1
oklch(80.8% 0.042 213.7)
-
Step 400
400
#6CACBA
oklch(70.6% 0.069 213.1)
-
Step 500
500 (this color)
#4099AB
oklch(63.7% 0.088 213.2)
-
Step 600
600
#0A8195
oklch(55.5% 0.096 213.8)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#045967
oklch(42.7% 0.074 213.3)
-
Step 900
900
#134954
oklch(37.6% 0.057 214.2)
-
Step 950
950
#0E2B31
oklch(27% 0.036 213.3)
#4099AB 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) | #8B94AC | 0.080 |
| Deuteranopia (no green cones) | #7C88AB | 0.074 |
| Tritanopia (no blue cones) | #00A09E | 0.040 |
| Achromatopsia (no color) | #8D8D8D | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4099AB
#4099AB
oklch(63.7% 0.088 213.2)
- #BA7768
#BA7768
oklch(63.6% 0.088 33.3)
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 #4099AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.037
- Sea #3C9992 ΔE 0.039
- Teal Green #0A9396 ΔE 0.045
- Persian Green #2A9D8F ΔE 0.051
- Dull Teal #5F9E8F ΔE 0.054
- Blue Green #0F9B8E ΔE 0.055
- Dusty Teal #4C9085 ΔE 0.055
- Grey Teal #5E9B8A ΔE 0.055
Use #4099AB 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.