#045555
Closest named color: Deep Teal (#00555A). oklch(40.8% 0.068 194.8), rgb(4, 85, 85).
Aa
White text reads best on this color (8.62:1).
About this color
#045555 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.068 and its hue 195°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.009 away. White text reads best on it, at 8.62:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.43:1 |
| White text | 8.62:1 |
Values
| HEX | #045555 |
| RGB | rgb(4, 85, 85) |
| HSL | hsl(180, 91%, 17%) |
| OKLCH | oklch(40.8% 0.068 194.8) |
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 #045555 | 8.62:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #045555 | 2.43:1 | Fails | Lc 14.8 | Not readable |
| #045555 text on white | 8.62:1 | AAA | Lc 89.2 | Fine for body text |
| #045555 text on black | 2.43:1 | Fails | Lc -13.1 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#C9DEDD
oklch(88.5% 0.022 193.3)
-
Step 300
300
#A4C9C8
oklch(80.9% 0.039 194.4)
-
Step 400
400
#70ADAD
oklch(70.6% 0.063 195.8)
-
Step 500
500
#449998
oklch(63.1% 0.082 194.2)
-
Step 600
600
#1B8383
oklch(55.5% 0.088 194.9)
-
Step 700
700
#066F6F
oklch(49.1% 0.082 194.8)
-
Step 800
800 (this color)
#045555
oklch(40.8% 0.068 194.8)
-
Step 900
900
#174A4A
oklch(37.6% 0.053 195.1)
-
Step 950
950
#102C2B
oklch(27.1% 0.034 192.2)
#045555 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) | #4F5055 | 0.072 |
| Deuteranopia (no green cones) | #444955 | 0.065 |
| Tritanopia (no blue cones) | #005855 | 0.010 |
| Achromatopsia (no color) | #4C4C4C | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045555
#045555
oklch(40.8% 0.068 194.8)
- #6A393E
#6A393E
oklch(40.7% 0.07 14.1)
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 #045555, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.009
- Dark Blue Green #005249 ΔE 0.021
- Dark Teal #014D4E ΔE 0.027
- Dark Slate Gray #2F4F4F ΔE 0.031
- Petrol #005F6A ΔE 0.041
- Dark Green Blue #1F6357 ΔE 0.050
- Charcoal #264653 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.056
Use #045555 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.