#04575A
Closest named color: Deep Teal (#00555A). oklch(41.5% 0.069 199), rgb(4, 87, 90).
Aa
White text reads best on this color (8.34:1).
About this color
#04575A is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.069 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.007 away. White text reads best on it, at 8.34:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.51:1 |
| White text | 8.34:1 |
Values
| HEX | #04575A |
| RGB | rgb(4, 87, 90) |
| HSL | hsl(182, 91%, 18%) |
| OKLCH | oklch(41.5% 0.069 199) |
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 #04575A | 8.34:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #04575A | 2.51:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #04575A text on white | 8.34:1 | AAA | Lc 88.3 | Fine for body text |
| #04575A text on black | 2.51:1 | Fails | Lc -13.8 | 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
#C9DEDF
oklch(88.5% 0.022 200.2)
-
Step 300
300
#A3C9CA
oklch(80.9% 0.04 198.4)
-
Step 400
400
#6EADB0
oklch(70.6% 0.065 199.6)
-
Step 500
500
#42999C
oklch(63.2% 0.083 198.4)
-
Step 600
600
#158387
oklch(55.6% 0.09 198.8)
-
Step 700
700
#006F72
oklch(49.2% 0.084 198.1)
-
Step 800
800 (this color)
#04575A
oklch(41.5% 0.069 199)
-
Step 900
900
#164A4C
oklch(37.6% 0.054 198.8)
-
Step 950
950
#0F2C2D
oklch(27.2% 0.035 198.4)
#04575A 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) | #50525A | 0.072 |
| Deuteranopia (no green cones) | #454A5A | 0.067 |
| Tritanopia (no blue cones) | #005B58 | 0.015 |
| Achromatopsia (no color) | #4E4E4E | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04575A
#04575A
oklch(41.5% 0.069 199)
- #6D3C3D
#6D3C3D
oklch(41.7% 0.069 19.2)
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 #04575A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.007
- Dark Blue Green #005249 ΔE 0.030
- Petrol #005F6A ΔE 0.032
- Dark Slate Gray #2F4F4F ΔE 0.034
- Dark Teal #014D4E ΔE 0.035
- Dark Green Blue #1F6357 ΔE 0.045
- Charcoal #264653 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.058
Use #04575A 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.