#04636B
Closest named color: Petrol (#005F6A). oklch(45.6% 0.077 204.6), rgb(4, 99, 107).
Aa
White text reads best on this color (6.99:1).
About this color
#04636B is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 46%, its chroma 0.077 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.013 away. White text reads best on it, at 6.99:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.00:1 |
| White text | 6.99:1 |
Values
| HEX | #04636B |
| RGB | rgb(4, 99, 107) |
| HSL | hsl(185, 93%, 22%) |
| OKLCH | oklch(45.6% 0.077 204.6) |
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 #04636B | 6.99:1 | AA | Lc -88.7 | Fine for body text |
| Black text on #04636B | 3.00:1 | AA large text | Lc 20.3 | Dividers and decoration only |
| #04636B text on white | 6.99:1 | AA | Lc 83.7 | Fine for body text |
| #04636B text on black | 3.00:1 | AA large text | Lc -18.2 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDEE
oklch(93.7% 0.014 202.5)
-
Step 200
200
#C7DEE1
oklch(88.4% 0.025 206.2)
-
Step 300
300
#9FCACE
oklch(81% 0.046 203.3)
-
Step 400
400
#67AEB6
oklch(70.7% 0.072 204.9)
-
Step 500
500
#3499A3
oklch(63% 0.092 204.5)
-
Step 600
600
#00838D
oklch(55.6% 0.095 204.2)
-
Step 700
700
#006E77
oklch(49.1% 0.084 204.7)
-
Step 800
800 (this color)
#04636B
oklch(45.6% 0.077 204.6)
-
Step 900
900
#0B4B50
oklch(37.8% 0.06 203.1)
-
Step 950
950
#0B2C2F
oklch(27.1% 0.038 203.6)
#04636B 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) | #5A5E6C | 0.077 |
| Deuteranopia (no green cones) | #4D556B | 0.070 |
| Tritanopia (no blue cones) | #006865 | 0.022 |
| Achromatopsia (no color) | #595959 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04636B
#04636B
oklch(45.6% 0.077 204.6)
- #7C4541
#7C4541
oklch(45.6% 0.076 24.9)
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 #04636B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.013
- Dark Aqua #05696B ΔE 0.020
- Dark Green Blue #1F6357 ΔE 0.033
- Deep Teal #00555A ΔE 0.048
- Deep Turquoise #017374 ΔE 0.050
- Dark Aquamarine #017371 ΔE 0.050
- YInMn Blue #415A77 ΔE 0.057
- Slate #516572 ΔE 0.065
Use #04636B 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.