#045A5B
Closest named color: Deep Teal (#00555A). oklch(42.4% 0.071 196.1), rgb(4, 90, 91).
Aa
White text reads best on this color (8.01:1).
About this color
#045A5B is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 42%, its chroma 0.071 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.017 away. White text reads best on it, at 8.01:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.071) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.61:1 |
| White text | 8.01:1 |
Values
| HEX | #045A5B |
| RGB | rgb(4, 90, 91) |
| HSL | hsl(181, 92%, 19%) |
| OKLCH | oklch(42.4% 0.071 196.1) |
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 #045A5B | 8.01:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #045A5B | 2.61:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #045A5B text on white | 8.01:1 | AAA | Lc 87.3 | Fine for body text |
| #045A5B text on black | 2.61:1 | Fails | Lc -14.8 | 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
#E1ECEC
oklch(93.5% 0.012 197)
-
Step 200
200
#C9DEDE
oklch(88.5% 0.022 196.8)
-
Step 300
300
#A2C9C9
oklch(80.8% 0.041 196.4)
-
Step 400
400
#6DAEAE
oklch(70.7% 0.067 195.8)
-
Step 500
500
#3F999A
oklch(63% 0.085 196.2)
-
Step 600
600
#0D8485
oklch(55.7% 0.093 195.8)
-
Step 700
700
#006F70
oklch(49.1% 0.084 195.9)
-
Step 800
800 (this color)
#045A5B
oklch(42.4% 0.071 196.1)
-
Step 900
900
#144B4B
oklch(37.8% 0.056 195.1)
-
Step 950
950
#0E2C2C
oklch(27.1% 0.035 195.3)
#045A5B 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) | #53555B | 0.074 |
| Deuteranopia (no green cones) | #484D5B | 0.068 |
| Tritanopia (no blue cones) | #005D5A | 0.011 |
| Achromatopsia (no color) | #505050 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045A5B
#045A5B
oklch(42.4% 0.071 196.1)
- #703D41
#703D41
oklch(42.4% 0.072 15.6)
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 #045A5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.017
- Petrol #005F6A ΔE 0.026
- Dark Blue Green #005249 ΔE 0.035
- Dark Green Blue #1F6357 ΔE 0.036
- Dark Slate Gray #2F4F4F ΔE 0.040
- Dark Teal #014D4E ΔE 0.044
- Dark Aqua #05696B ΔE 0.049
- Charcoal #264653 ΔE 0.063
Use #045A5B 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.