#045B6F
Closest named color: Petrol (#005F6A). oklch(43.6% 0.078 219.9), rgb(4, 91, 111).
Aa
White text reads best on this color (7.68:1).
About this color
#045B6F is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 44%, its chroma 0.078 and its hue 220°. 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 7.68:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.73:1 |
| White text | 7.68:1 |
Values
| HEX | #045B6F |
| RGB | rgb(4, 91, 111) |
| HSL | hsl(191, 93%, 23%) |
| OKLCH | oklch(43.6% 0.078 219.9) |
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 #045B6F | 7.68:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #045B6F | 2.73:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #045B6F text on white | 7.68:1 | AAA | Lc 86.2 | Fine for body text |
| #045B6F text on black | 2.73:1 | Fails | Lc -15.8 | 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
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C8DDE5
oklch(88.4% 0.025 222.6)
-
Step 300
300
#A1C8D5
oklch(80.9% 0.045 220.1)
-
Step 400
400
#6AACC0
oklch(70.8% 0.073 219.2)
-
Step 500
500
#3B96B0
oklch(63% 0.093 220.1)
-
Step 600
600
#00809C
oklch(55.5% 0.101 220.3)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800 (this color)
#045B6F
oklch(43.6% 0.078 219.9)
-
Step 900
900
#114958
oklch(37.7% 0.061 220)
-
Step 950
950
#0D2B33
oklch(27.1% 0.038 218.3)
#045B6F 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) | #4F5870 | 0.065 |
| Deuteranopia (no green cones) | #424F6F | 0.058 |
| Tritanopia (no blue cones) | #006161 | 0.035 |
| Achromatopsia (no color) | #535353 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045B6F
#045B6F
oklch(43.6% 0.078 219.9)
- #76412F
#76412F
oklch(43.6% 0.079 39.4)
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 #045B6F, 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 0.037
- Deep Sea Blue #015482 ΔE 0.043
- Dark Aqua #05696B ΔE 0.048
- YInMn Blue #415A77 ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.052
- Dark Green Blue #1F6357 ΔE 0.055
- Light Navy #155084 ΔE 0.055
Use #045B6F 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.