#045B5D
Closest named color: Deep Teal (#00555A). oklch(42.8% 0.072 197.5), rgb(4, 91, 93).
Aa
White text reads best on this color (7.89:1).
About this color
#045B5D is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 43%, its chroma 0.072 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.020 away. White text reads best on it, at 7.89:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.65:1 |
| White text | 7.89:1 |
Values
| HEX | #045B5D |
| RGB | rgb(4, 91, 93) |
| HSL | hsl(181, 92%, 19%) |
| OKLCH | oklch(42.8% 0.072 197.5) |
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 #045B5D | 7.89:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #045B5D | 2.65:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #045B5D text on white | 7.89:1 | AAA | Lc 86.9 | Fine for body text |
| #045B5D text on black | 2.65:1 | Fails | Lc -15.2 | 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
#E1ECED
oklch(93.5% 0.012 203.5)
-
Step 200
200
#C8DEDE
oklch(88.4% 0.023 196.7)
-
Step 300
300
#A2C9CA
oklch(80.8% 0.041 198.3)
-
Step 400
400
#6CAEAF
oklch(70.7% 0.067 197)
-
Step 500
500
#3E999C
oklch(63% 0.085 198.2)
-
Step 600
600
#098486
oklch(55.7% 0.093 196.7)
-
Step 700
700
#006F71
oklch(49.1% 0.084 197)
-
Step 800
800 (this color)
#045B5D
oklch(42.8% 0.072 197.5)
-
Step 900
900
#134B4C
oklch(37.8% 0.056 196.8)
-
Step 950
950
#0E2C2C
oklch(27.1% 0.035 195.3)
#045B5D 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) | #54565D | 0.074 |
| Deuteranopia (no green cones) | #484E5D | 0.068 |
| Tritanopia (no blue cones) | #005F5B | 0.015 |
| Achromatopsia (no color) | #515151 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045B5D
#045B5D
oklch(42.8% 0.072 197.5)
- #713E41
#713E41
oklch(42.7% 0.071 16.8)
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 #045B5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.020
- Petrol #005F6A ΔE 0.022
- Dark Green Blue #1F6357 ΔE 0.034
- Dark Blue Green #005249 ΔE 0.039
- Dark Slate Gray #2F4F4F ΔE 0.042
- Dark Aqua #05696B ΔE 0.046
- Dark Teal #014D4E ΔE 0.047
- Spruce #0A5F38 ΔE 0.065
Use #045B5D 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.