#3998AD
Closest named color: Sea (#3C9992). oklch(63.3% 0.092 215.2), rgb(57, 152, 173).
Aa
Black text reads best on this color (6.26:1).
About this color
#3998AD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 63%, its chroma 0.092 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Sea (#3C9992), ΔE 0.043 away. Black text reads best on it, at 6.26:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Sea (#3C9992) |
| Black text | 6.26:1 |
| White text | 3.34:1 |
Values
| HEX | #3998AD |
| RGB | rgb(57, 152, 173) |
| HSL | hsl(191, 50%, 45%) |
| OKLCH | oklch(63.3% 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 #3998AD | 3.34:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #3998AD | 6.26:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #3998AD text on white | 3.34:1 | AA large text | Lc 60.7 | Content text, not long reading |
| #3998AD text on black | 6.26:1 | AA | Lc -41.0 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C7DEE4
oklch(88.5% 0.026 215.2)
-
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)
#3998AD
oklch(63.3% 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)
#3998AD 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) | #8993AE | 0.082 |
| Deuteranopia (no green cones) | #7987AD | 0.075 |
| Tritanopia (no blue cones) | #00A09E | 0.042 |
| Achromatopsia (no color) | #8C8C8C | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3998AD
#3998AD
oklch(63.3% 0.092 215.2)
- #BB7563
#BB7563
oklch(63.3% 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 #3998AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea #3C9992 ΔE 0.043
- Teal Green #0A9396 ΔE 0.043
- Cadet Blue #5F9EA0 ΔE 0.043
- Blue NCS #118AB2 ΔE 0.050
- Persian Green #2A9D8F ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.056
- Blue Green #0F9B8E ΔE 0.056
- Teal Blue #01889F ΔE 0.057
Use #3998AD 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.