#045F74
Closest named color: Petrol (#005F6A). oklch(44.9% 0.081 220.1), rgb(4, 95, 116).
Aa
White text reads best on this color (7.25:1).
About this color
#045F74 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 45%, its chroma 0.081 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 7.25:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.89:1 |
| White text | 7.25:1 |
Values
| HEX | #045F74 |
| RGB | rgb(4, 95, 116) |
| HSL | hsl(191, 93%, 24%) |
| OKLCH | oklch(44.9% 0.081 220.1) |
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 #045F74 | 7.25:1 | AAA | Lc -89.6 | Fine for body text |
| Black text on #045F74 | 2.89:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #045F74 text on white | 7.25:1 | AAA | Lc 84.7 | Fine for body text |
| #045F74 text on black | 2.89:1 | Fails | Lc -17.3 | 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
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C7DEE5
oklch(88.6% 0.026 218)
-
Step 300
300
#A0C8D6
oklch(80.9% 0.047 221.2)
-
Step 400
400
#68ACC1
oklch(70.7% 0.075 219.7)
-
Step 500
500
#3697B2
oklch(63.2% 0.097 220)
-
Step 600
600
#00809C
oklch(55.5% 0.101 220.3)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800 (this color)
#045F74
oklch(44.9% 0.081 220.1)
-
Step 900
900
#0D4959
oklch(37.7% 0.063 220.7)
-
Step 950
950
#0B2B34
oklch(27% 0.04 219.8)
#045F74 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) | #525C75 | 0.066 |
| Deuteranopia (no green cones) | #455374 | 0.059 |
| Tritanopia (no blue cones) | #006666 | 0.037 |
| Achromatopsia (no color) | #575757 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045F74
#045F74
oklch(44.9% 0.081 220.1)
- #7B4531
#7B4531
oklch(45.1% 0.081 40.9)
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 #045F74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.017
- Dark Aqua #05696B ΔE 0.040
- YInMn Blue #415A77 ΔE 0.046
- Deep Sea Blue #015482 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.048
- Deep Teal #00555A ΔE 0.048
- Dark Green Blue #1F6357 ΔE 0.054
- Peacock Blue #016795 ΔE 0.055
Use #045F74 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.