#04575D
Closest named color: Deep Teal (#00555A). oklch(41.7% 0.07 203.1), rgb(4, 87, 93).
Aa
White text reads best on this color (8.31:1).
About this color
#04575D is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.070 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.008 away. White text reads best on it, at 8.31:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.52:1 |
| White text | 8.31:1 |
Values
| HEX | #04575D |
| RGB | rgb(4, 87, 93) |
| HSL | hsl(184, 92%, 19%) |
| OKLCH | oklch(41.7% 0.07 203.1) |
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 #04575D | 8.31:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #04575D | 2.52:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #04575D text on white | 8.31:1 | AAA | Lc 88.2 | Fine for body text |
| #04575D text on black | 2.52:1 | Fails | Lc -13.9 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECED
oklch(93.5% 0.012 203.5)
-
Step 200
200
#C9DEE0
oklch(88.6% 0.023 203.7)
-
Step 300
300
#A3C9CC
oklch(80.9% 0.041 202.3)
-
Step 400
400
#6EADB3
oklch(70.7% 0.065 203.5)
-
Step 500
500
#4198A0
oklch(63% 0.083 203.5)
-
Step 600
600
#14828B
oklch(55.5% 0.09 203.8)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800 (this color)
#04575D
oklch(41.7% 0.07 203.1)
-
Step 900
900
#164A4E
oklch(37.7% 0.054 202.4)
-
Step 950
950
#0F2B2E
oklch(26.9% 0.034 204.8)
#04575D 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) | #4F535D | 0.069 |
| Deuteranopia (no green cones) | #444B5D | 0.063 |
| Tritanopia (no blue cones) | #005B59 | 0.017 |
| Achromatopsia (no color) | #4E4E4E | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04575D
#04575D
oklch(41.7% 0.07 203.1)
- #6D3C3A
#6D3C3A
oklch(41.6% 0.069 23)
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 #04575D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.008
- Petrol #005F6A ΔE 0.029
- Dark Blue Green #005249 ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.035
- Dark Teal #014D4E ΔE 0.037
- Dark Green Blue #1F6357 ΔE 0.047
- Charcoal #264653 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.056
Use #04575D 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.