#04576F
Closest named color: Petrol (#005F6A). oklch(42.5% 0.079 225.1), rgb(4, 87, 111).
Aa
White text reads best on this color (8.08:1).
About this color
#04576F is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 43%, its chroma 0.079 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.030 away. White text reads best on it, at 8.08:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.59:1 |
| White text | 8.08:1 |
Values
| HEX | #04576F |
| RGB | rgb(4, 87, 111) |
| HSL | hsl(193, 93%, 23%) |
| OKLCH | oklch(42.5% 0.079 225.1) |
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 #04576F | 8.08:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #04576F | 2.59:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #04576F text on white | 8.08:1 | AAA | Lc 87.5 | Fine for body text |
| #04576F text on black | 2.59:1 | Fails | Lc -14.6 | Not readable |
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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE6
oklch(88.5% 0.026 225.3)
-
Step 300
300
#A1C8D7
oklch(81% 0.046 223.3)
-
Step 400
400
#6CABC4
oklch(70.8% 0.074 225.2)
-
Step 500
500
#3E95B5
oklch(63% 0.095 225.7)
-
Step 600
600
#0C7FA0
oklch(55.5% 0.103 224.9)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800 (this color)
#04576F
oklch(42.5% 0.079 225.1)
-
Step 900
900
#13485A
oklch(37.6% 0.062 225)
-
Step 950
950
#0E2A35
oklch(26.9% 0.039 226.8)
#04576F 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) | #4A5570 | 0.060 |
| Deuteranopia (no green cones) | #3D4C6F | 0.052 |
| Tritanopia (no blue cones) | #005E5F | 0.040 |
| Achromatopsia (no color) | #505050 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04576F
#04576F
oklch(42.5% 0.079 225.1)
- #723F28
#723F28
oklch(42.5% 0.08 44.4)
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 #04576F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.030
- Deep Teal #00555A ΔE 0.036
- Deep Sea Blue #015482 ΔE 0.036
- Light Navy #155084 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.052
- YInMn Blue #415A77 ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.056
Use #04576F 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.