#045B6B
Closest named color: Petrol (#005F6A). oklch(43.4% 0.076 215.3), rgb(4, 91, 107).
Aa
White text reads best on this color (7.73:1).
About this color
#045B6B is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 43%, its chroma 0.076 and its hue 215°. 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 7.73:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.71:1 |
| White text | 7.73:1 |
Values
| HEX | #045B6B |
| RGB | rgb(4, 91, 107) |
| HSL | hsl(189, 93%, 22%) |
| OKLCH | oklch(43.4% 0.076 215.3) |
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 #045B6B | 7.73:1 | AAA | Lc -91.2 | Preferred for body text |
| Black text on #045B6B | 2.71:1 | Fails | Lc 17.6 | Dividers and decoration only |
| #045B6B text on white | 7.73:1 | AAA | Lc 86.4 | Fine for body text |
| #045B6B text on black | 2.71:1 | Fails | Lc -15.7 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE3
oklch(88.6% 0.024 212.9)
-
Step 300
300
#A1C8D3
oklch(80.8% 0.044 216.8)
-
Step 400
400
#6BACBC
oklch(70.7% 0.07 215.1)
-
Step 500
500
#3C97AC
oklch(63.1% 0.09 215.7)
-
Step 600
600
#018197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D80
oklch(49.2% 0.087 215.3)
-
Step 800
800 (this color)
#045B6B
oklch(43.4% 0.076 215.3)
-
Step 900
900
#114955
oklch(37.6% 0.059 215.5)
-
Step 950
950
#0D2B32
oklch(27% 0.037 215.6)
#045B6B 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) | #50586C | 0.067 |
| Deuteranopia (no green cones) | #444F6B | 0.060 |
| Tritanopia (no blue cones) | #006160 | 0.031 |
| Achromatopsia (no color) | #535353 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045B6B
#045B6B
oklch(43.4% 0.076 215.3)
- #754133
#754133
oklch(43.5% 0.076 35.9)
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 #045B6B, 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 0.031
- Dark Aqua #05696B ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.050
- Dark Green Blue #1F6357 ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.052
- YInMn Blue #415A77 ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.058
Use #045B6B 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.