#045F4F
Closest named color: Dark Green Blue (#1F6357). oklch(43.4% 0.08 175.7), rgb(4, 95, 79).
Aa
White text reads best on this color (7.62:1).
About this color
#045F4F is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 43%, its chroma 0.080 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.022 away. White text reads best on it, at 7.62:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #045F4F |
| RGB | rgb(4, 95, 79) |
| HSL | hsl(169, 92%, 19%) |
| OKLCH | oklch(43.4% 0.08 175.7) |
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 #045F4F | 7.62:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #045F4F | 2.75:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #045F4F text on white | 7.62:1 | AAA | Lc 86.0 | Fine for body text |
| #045F4F text on black | 2.75:1 | Fails | Lc -16.0 | 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
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E1EDE9
oklch(93.6% 0.014 174.2)
-
Step 200
200
#C8DFD8
oklch(88.5% 0.026 175.5)
-
Step 300
300
#A2CBBF
oklch(80.9% 0.047 175.3)
-
Step 400
400
#6CB09E
oklch(70.7% 0.075 175.3)
-
Step 500
500
#3C9C87
oklch(63% 0.095 176.1)
-
Step 600
600
#018771
oklch(55.7% 0.104 175.8)
-
Step 700
700
#00715E
oklch(49% 0.092 175.6)
-
Step 800
800 (this color)
#045F4F
oklch(43.4% 0.08 175.7)
-
Step 900
900
#124C40
oklch(37.6% 0.062 175.9)
-
Step 950
950
#0D2D26
oklch(27.1% 0.04 176.4)
#045F4F 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) | #5B584E | 0.084 |
| Deuteranopia (no green cones) | #505050 | 0.080 |
| Tritanopia (no blue cones) | #00605A | 0.017 |
| Achromatopsia (no color) | #545454 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045F4F
#045F4F
oklch(43.4% 0.08 175.7)
- #733D53
#733D53
oklch(43.4% 0.08 355.1)
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 #045F4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.022
- Spruce #0A5F38 ΔE 0.036
- Pine #2B5D34 ΔE 0.041
- Dark Blue Green #005249 ΔE 0.043
- Deep Teal #00555A ΔE 0.043
- Petrol #005F6A ΔE 0.045
- Dark Aqua #05696B ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.056
Use #045F4F 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.