#3D99AE
Closest named color: Cadet Blue (#5F9EA0). oklch(63.7% 0.091 215.5), rgb(61, 153, 174).
Aa
Black text reads best on this color (6.36:1).
About this color
#3D99AE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.091 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.040 away. Black text reads best on it, at 6.36:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.36:1 |
| White text | 3.29:1 |
Values
| HEX | #3D99AE |
| RGB | rgb(61, 153, 174) |
| HSL | hsl(191, 48%, 46%) |
| OKLCH | oklch(63.7% 0.091 215.5) |
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 #3D99AE | 3.29:1 | AA large text | Lc -65.5 | Content text, not long reading |
| Black text on #3D99AE | 6.36:1 | AA | Lc 44.0 | Non-text elements, placeholder text |
| #3D99AE text on white | 3.29:1 | AA large text | Lc 60.1 | Content text, not long reading |
| #3D99AE 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
#A1C8D3
oklch(80.8% 0.044 216.8)
-
Step 400
400
#6AACBD
oklch(70.7% 0.072 216)
-
Step 500
500 (this color)
#3D99AE
oklch(63.7% 0.091 215.5)
-
Step 600
600
#008198
oklch(55.6% 0.099 216.1)
-
Step 700
700
#006D80
oklch(49.2% 0.087 215.3)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#114955
oklch(37.6% 0.059 215.5)
-
Step 950
950
#0D2B32
oklch(27% 0.037 215.6)
#3D99AE 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 | 0.080 |
| Deuteranopia (no green cones) | #7A88AE | 0.074 |
| Tritanopia (no blue cones) | #00A19F | 0.043 |
| Achromatopsia (no color) | #8D8D8D | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D99AE
#3D99AE
oklch(63.7% 0.091 215.5)
- #BB7765
#BB7765
oklch(63.7% 0.09 35.6)
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 #3D99AE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.040
- Sea #3C9992 ΔE 0.044
- Teal Green #0A9396 ΔE 0.047
- Blue NCS #118AB2 ΔE 0.054
- Persian Green #2A9D8F ΔE 0.055
- Dusty Blue #5A86AD ΔE 0.057
- Faded Blue #658CBB ΔE 0.058
- Blue Green #0F9B8E ΔE 0.058
Use #3D99AE 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.