#004757
Closest named color: Charcoal (#264653). oklch(36.8% 0.067 219.3), rgb(0, 71, 87).
Aa
White text reads best on this color (10.29:1).
About this color
#004757 is a dark, muted teal or cyan. In OKLCH its lightness is 37%, its chroma 0.067 and its hue 219°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.025 away. White text reads best on it, at 10.29:1.
| Hue family | Teals and cyans |
| Lightness | dark (37%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.03:1 |
| White text | 10.29:1 |
Values
| HEX | #004757 |
| RGB | rgb(0, 71, 87) |
| HSL | hsl(191, 100%, 17%) |
| OKLCH | oklch(36.8% 0.067 219.3) |
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 #004757 | 10.29:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #004757 | 2.03:1 | Fails | Lc 10.5 | Not readable |
| #004757 text on white | 10.29:1 | AAA | Lc 93.4 | Preferred for body text |
| #004757 text on black | 2.03:1 | Fails | Lc -9.1 | Not readable |
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 900.
-
Step 50
50
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C6DEE6
oklch(88.5% 0.028 219.8)
-
Step 300
300
#9DC9D7
oklch(80.9% 0.05 219.3)
-
Step 400
400
#63ADC3
oklch(70.8% 0.08 219.2)
-
Step 500
500
#2B98B3
oklch(63.2% 0.102 218.5)
-
Step 600
600
#00819B
oklch(55.7% 0.1 218.5)
-
Step 700
700
#006C83
oklch(49.1% 0.089 219.3)
-
Step 800
800
#00586C
oklch(42.6% 0.078 220.2)
-
Step 900
900 (this color)
#004757
oklch(36.8% 0.067 219.3)
-
Step 950
950
#082B34
oklch(26.9% 0.042 218.6)
#004757 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) | #3D4558 | 0.056 |
| Deuteranopia (no green cones) | #333D57 | 0.050 |
| Tritanopia (no blue cones) | #004C4C | 0.029 |
| Achromatopsia (no color) | #404040 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #004757
#004757
oklch(36.8% 0.067 219.3)
- #5D3224
#5D3224
oklch(36.9% 0.067 38.7)
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 #004757, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.025
- Dark Teal #014D4E ΔE 0.029
- Dark Grey Blue #29465B ΔE 0.030
- Dark Blue Grey #1F3B4D ΔE 0.040
- Midnight Green #073B4C ΔE 0.040
- Deep Teal #00555A ΔE 0.046
- Dark Slate Gray #2F4F4F ΔE 0.050
- Dark Blue Green #005249 ΔE 0.051
Use #004757 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.