#04585A
Closest named color: Deep Teal (#00555A). oklch(41.8% 0.07 197.5), rgb(4, 88, 90).
Aa
White text reads best on this color (8.23:1).
About this color
#04585A is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.070 and its hue 198°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.010 away. White text reads best on it, at 8.23:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.54:1 |
| White text | 8.23:1 |
Values
| HEX | #04585A |
| RGB | rgb(4, 88, 90) |
| HSL | hsl(181, 91%, 18%) |
| OKLCH | oklch(41.8% 0.07 197.5) |
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 #04585A | 8.23:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #04585A | 2.54:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #04585A text on white | 8.23:1 | AAA | Lc 88.0 | Fine for body text |
| #04585A text on black | 2.54:1 | Fails | Lc -14.1 | 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
#E1ECEC
oklch(93.5% 0.012 197)
-
Step 200
200
#C9DEDE
oklch(88.5% 0.022 196.8)
-
Step 300
300
#A3C9CA
oklch(80.9% 0.04 198.4)
-
Step 400
400
#6EAEAF
oklch(70.8% 0.066 197)
-
Step 500
500
#41999B
oklch(63.1% 0.084 197.3)
-
Step 600
600
#138386
oklch(55.5% 0.091 197.8)
-
Step 700
700
#006F71
oklch(49.1% 0.084 197)
-
Step 800
800 (this color)
#04585A
oklch(41.8% 0.07 197.5)
-
Step 900
900
#154A4C
oklch(37.6% 0.054 198.7)
-
Step 950
950
#0F2C2C
oklch(27.1% 0.035 195.3)
#04585A 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) | #51535A | 0.072 |
| Deuteranopia (no green cones) | #464B5A | 0.067 |
| Tritanopia (no blue cones) | #005C58 | 0.015 |
| Achromatopsia (no color) | #4F4F4F | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04585A
#04585A
oklch(41.8% 0.07 197.5)
- #6E3C3E
#6E3C3E
oklch(41.9% 0.07 18)
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 #04585A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.010
- Petrol #005F6A ΔE 0.030
- Dark Blue Green #005249 ΔE 0.031
- Dark Slate Gray #2F4F4F ΔE 0.036
- Dark Teal #014D4E ΔE 0.038
- Dark Green Blue #1F6357 ΔE 0.042
- Dark Aqua #05696B ΔE 0.055
- Charcoal #264653 ΔE 0.057
Use #04585A 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.