#3B99AE
Closest named color: Cadet Blue (#5F9EA0). oklch(63.6% 0.092 215.2), rgb(59, 153, 174).
Aa
Black text reads best on this color (6.35:1).
About this color
#3B99AE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.092 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.041 away. Black text reads best on it, at 6.35:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.35:1 |
| White text | 3.30:1 |
Values
| HEX | #3B99AE |
| RGB | rgb(59, 153, 174) |
| HSL | hsl(191, 49%, 46%) |
| OKLCH | oklch(63.6% 0.092 215.2) |
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 #3B99AE | 3.30:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #3B99AE | 6.35:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #3B99AE text on white | 3.30:1 | AA large text | Lc 60.2 | Content text, not long reading |
| #3B99AE text on black | 6.35:1 | 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
#C8DEE4
oklch(88.6% 0.025 215.9)
-
Step 300
300
#A0C9D3
oklch(81% 0.046 214.2)
-
Step 400
400
#69ACBD
oklch(70.6% 0.072 215.8)
-
Step 500
500 (this color)
#3B99AE
oklch(63.6% 0.092 215.2)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#0F4956
oklch(37.6% 0.06 216.6)
-
Step 950
950
#0C2B32
oklch(27% 0.038 215.2)
#3B99AE 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) | #8A94AF | 0.082 |
| Deuteranopia (no green cones) | #7A88AE | 0.075 |
| Tritanopia (no blue cones) | #00A19F | 0.043 |
| Achromatopsia (no color) | #8D8D8D | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B99AE
#3B99AE
oklch(63.6% 0.092 215.2)
- #BC7664
#BC7664
oklch(63.6% 0.093 35.2)
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 #3B99AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.041
- Sea #3C9992 ΔE 0.043
- Teal Green #0A9396 ΔE 0.046
- Blue NCS #118AB2 ΔE 0.053
- Persian Green #2A9D8F ΔE 0.055
- Blue Green #0F9B8E ΔE 0.057
- Dusty Blue #5A86AD ΔE 0.057
- Faded Blue #658CBB ΔE 0.059
Use #3B99AE 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.