#045B64
Closest named color: Petrol (#005F6A). oklch(43.1% 0.073 206.7), rgb(4, 91, 100).
Aa
White text reads best on this color (7.81:1).
About this color
#045B64 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 43%, its chroma 0.073 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.014 away. White text reads best on it, at 7.81:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.68:1 |
| White text | 7.81:1 |
Values
| HEX | #045B64 |
| RGB | rgb(4, 91, 100) |
| HSL | hsl(186, 92%, 20%) |
| OKLCH | oklch(43.1% 0.073 206.7) |
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 #045B64 | 7.81:1 | AAA | Lc -91.4 | Preferred for body text |
| Black text on #045B64 | 2.68:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #045B64 text on white | 7.81:1 | AAA | Lc 86.7 | Fine for body text |
| #045B64 text on black | 2.68:1 | Fails | Lc -15.4 | Dividers and decoration only |
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
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C8DEE1
oklch(88.5% 0.024 206.6)
-
Step 300
300
#A1C9CE
oklch(80.9% 0.043 205.7)
-
Step 400
400
#6CADB6
oklch(70.7% 0.068 206.9)
-
Step 500
500
#3D98A4
oklch(63% 0.087 207.2)
-
Step 600
600
#05828F
oklch(55.5% 0.094 207.2)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800 (this color)
#045B64
oklch(43.1% 0.073 206.7)
-
Step 900
900
#124A51
oklch(37.7% 0.057 207.2)
-
Step 950
950
#0D2B2F
oklch(26.9% 0.036 207.2)
#045B64 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) | #525765 | 0.071 |
| Deuteranopia (no green cones) | #464E64 | 0.065 |
| Tritanopia (no blue cones) | #00605E | 0.022 |
| Achromatopsia (no color) | #525252 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045B64
#045B64
oklch(43.1% 0.073 206.7)
- #73403A
#73403A
oklch(43.2% 0.072 27.6)
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 #045B64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.014
- Deep Teal #00555A ΔE 0.023
- Dark Green Blue #1F6357 ΔE 0.041
- Dark Aqua #05696B ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.046
- Dark Blue Green #005249 ΔE 0.048
- Dark Teal #014D4E ΔE 0.052
- YInMn Blue #415A77 ΔE 0.060
Use #045B64 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.