#045A63
Closest named color: Petrol (#005F6A). oklch(42.8% 0.072 206.8), rgb(4, 90, 99).
Aa
White text reads best on this color (7.93:1).
About this color
#045A63 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 43%, its chroma 0.072 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.017 away. White text reads best on it, at 7.93:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.64:1 |
| White text | 7.93:1 |
Values
| HEX | #045A63 |
| RGB | rgb(4, 90, 99) |
| HSL | hsl(186, 92%, 20%) |
| OKLCH | oklch(42.8% 0.072 206.8) |
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 #045A63 | 7.93:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #045A63 | 2.64:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #045A63 text on white | 7.93:1 | AAA | Lc 87.0 | Fine for body text |
| #045A63 text on black | 2.64:1 | Fails | Lc -15.1 | 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
#A2C9CE
oklch(80.9% 0.042 206)
-
Step 400
400
#6CADB6
oklch(70.7% 0.068 206.9)
-
Step 500
500
#3E98A4
oklch(63.1% 0.086 207.3)
-
Step 600
600
#09828F
oklch(55.5% 0.094 207.3)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800 (this color)
#045A63
oklch(42.8% 0.072 206.8)
-
Step 900
900
#134A51
oklch(37.8% 0.056 207.3)
-
Step 950
950
#0E2B2F
oklch(26.9% 0.035 207.5)
#045A63 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) | #515664 | 0.070 |
| Deuteranopia (no green cones) | #454D63 | 0.064 |
| Tritanopia (no blue cones) | #005F5D | 0.022 |
| Achromatopsia (no color) | #515151 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045A63
#045A63
oklch(42.8% 0.072 206.8)
- #723F3A
#723F3A
oklch(42.9% 0.072 26.4)
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 #045A63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.017
- Deep Teal #00555A ΔE 0.020
- Dark Green Blue #1F6357 ΔE 0.043
- Dark Slate Gray #2F4F4F ΔE 0.044
- Dark Blue Green #005249 ΔE 0.046
- Dark Aqua #05696B ΔE 0.047
- Dark Teal #014D4E ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.061
Use #045A63 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.