#03998D
Closest named color: Blue Green (#0F9B8E). oklch(61.4% 0.108 185.1), rgb(3, 153, 141).
Aa
Black text reads best on this color (5.94:1).
About this color
#03998D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 61%, its chroma 0.108 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Green (#0F9B8E), ΔE 0.007 away. Black text reads best on it, at 5.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Blue Green (#0F9B8E) |
| Black text | 5.94:1 |
| White text | 3.53:1 |
Values
| HEX | #03998D |
| RGB | rgb(3, 153, 141) |
| HSL | hsl(175, 96%, 31%) |
| OKLCH | oklch(61.4% 0.108 185.1) |
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 #03998D | 3.53:1 | AA large text | Lc -67.8 | Content text, not long reading |
| Black text on #03998D | 5.94:1 | AA | Lc 41.8 | Non-text elements, placeholder text |
| #03998D text on white | 3.53:1 | AA large text | Lc 62.3 | Content text, not long reading |
| #03998D text on black | 5.94:1 | AA | Lc -39.4 | 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
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#DFEDEB
oklch(93.5% 0.015 186.7)
-
Step 200
200
#C5E0DB
oklch(88.5% 0.029 183.3)
-
Step 300
300
#9BCCC5
oklch(80.9% 0.052 185.4)
-
Step 400
400
#5DB2A7
oklch(70.7% 0.085 184.6)
-
Step 500
500 (this color)
#03998D
oklch(61.4% 0.108 185.1)
-
Step 600
600
#00857B
oklch(55.5% 0.097 185.6)
-
Step 700
700
#007067
oklch(49% 0.086 185.2)
-
Step 800
800
#005C54
oklch(42.7% 0.075 184.7)
-
Step 900
900
#004D46
oklch(37.8% 0.067 184.5)
-
Step 950
950
#042D29
oklch(26.9% 0.044 185.2)
#03998D 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) | #90908D | 0.114 |
| Deuteranopia (no green cones) | #7F838E | 0.108 |
| Tritanopia (no blue cones) | #009D95 | 0.014 |
| Achromatopsia (no color) | #888888 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03998D
#03998D
oklch(61.4% 0.108 185.1)
- #BA677C
#BA677C
oklch(61.4% 0.108 4.6)
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 #03998D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Green #0F9B8E ΔE 0.007
- Persian Green #2A9D8F ΔE 0.018
- Sea #3C9992 ΔE 0.024
- Teal Green #0A9396 ΔE 0.026
- Dusty Teal #4C9085 ΔE 0.038
- Ocean Green #3D9973 ΔE 0.041
- Dark Cyan #008B8B ΔE 0.043
- Grey Teal #5E9B8A ΔE 0.051
Use #03998D 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.