#03644E
Closest named color: Dark Green Blue (#1F6357). oklch(44.8% 0.087 170.7), rgb(3, 100, 78).
Aa
White text reads best on this color (7.15:1).
About this color
#03644E is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 45%, its chroma 0.087 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.021 away. White text reads best on it, at 7.15:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.93:1 |
| White text | 7.15:1 |
Values
| HEX | #03644E |
| RGB | rgb(3, 100, 78) |
| HSL | hsl(166, 94%, 20%) |
| OKLCH | oklch(44.8% 0.087 170.7) |
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 #03644E | 7.15:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #03644E | 2.93:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #03644E text on white | 7.15:1 | AAA | Lc 84.3 | Fine for body text |
| #03644E text on black | 2.93:1 | Fails | Lc -17.7 | Dividers and decoration only |
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 800.
-
Step 50
50
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E1EDE8
oklch(93.6% 0.014 169.2)
-
Step 200
200
#C8E0D6
oklch(88.6% 0.029 168.7)
-
Step 300
300
#A0CCBC
oklch(80.9% 0.052 170.8)
-
Step 400
400
#69B19A
oklch(70.6% 0.081 171.4)
-
Step 500
500
#379E81
oklch(63.2% 0.104 170.8)
-
Step 600
600
#00876A
oklch(55.5% 0.109 170.8)
-
Step 700
700
#007259
oklch(49.1% 0.097 170.7)
-
Step 800
800 (this color)
#03644E
oklch(44.8% 0.087 170.7)
-
Step 900
900
#0E4D3C
oklch(37.7% 0.068 170.1)
-
Step 950
950
#0C2D23
oklch(26.9% 0.043 169.9)
#03644E 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) | #615C4D | 0.090 |
| Deuteranopia (no green cones) | #565450 | 0.087 |
| Tritanopia (no blue cones) | #00655E | 0.025 |
| Achromatopsia (no color) | #585858 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03644E
#03644E
oklch(44.8% 0.087 170.7)
- #783F5B
#783F5B
oklch(44.8% 0.087 350.4)
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 #03644E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.021
- Spruce #0A5F38 ΔE 0.033
- Pine #2B5D34 ΔE 0.038
- Dark Aqua #05696B ΔE 0.046
- Petrol #005F6A ΔE 0.054
- Dark Blue Green #005249 ΔE 0.059
- Deep Teal #00555A ΔE 0.060
- Dark Aquamarine #017371 ΔE 0.063
Use #03644E 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.