#213743
Closest named color: Gunmetal (#293241). oklch(32.4% 0.035 233.2), rgb(33, 55, 67).
Aa
White text reads best on this color (12.40:1).
About this color
#213743 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.035 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Gunmetal (#293241), ΔE 0.018 away. White text reads best on it, at 12.40:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Gunmetal (#293241) |
| Black text | 1.69:1 |
| White text | 12.40:1 |
Values
| HEX | #213743 |
| RGB | rgb(33, 55, 67) |
| HSL | hsl(201, 34%, 20%) |
| OKLCH | oklch(32.4% 0.035 233.2) |
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 #213743 | 12.40:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #213743 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #213743 text on white | 12.40:1 | AAA | Lc 98.2 | Preferred for body text |
| #213743 text on black | 1.69:1 | Fails | Lc 0.0 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE1
oklch(88.5% 0.015 231.2)
-
Step 300
300
#B1C4CF
oklch(80.9% 0.026 233.1)
-
Step 400
400
#87A6B7
oklch(70.8% 0.042 232.1)
-
Step 500
500
#698FA5
oklch(63% 0.054 234.1)
-
Step 600
600
#507990
oklch(55.5% 0.058 233.8)
-
Step 700
700
#40667B
oklch(49.1% 0.055 233.7)
-
Step 800
800
#355364
oklch(42.6% 0.045 234.2)
-
Step 900
900 (this color)
#213743
oklch(32.4% 0.035 233.2)
-
Step 950
950
#1C2830
oklch(26.9% 0.022 237.9)
#213743 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) | #313644 | 0.023 |
| Deuteranopia (no green cones) | #2C3343 | 0.019 |
| Tritanopia (no blue cones) | #123A3B | 0.026 |
| Achromatopsia (no color) | #343434 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213743
#213743
oklch(32.4% 0.035 233.2)
- #422F23
#422F23
oklch(32.4% 0.035 53.4)
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 #213743, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Gunmetal #293241 ΔE 0.018
- Dark Blue Grey #1F3B4D ΔE 0.019
- Midnight Green #073B4C ΔE 0.025
- Onyx #343A40 ΔE 0.031
- Space Cadet #2B2D42 ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.039
- Charcoal #264653 ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.055
Use #213743 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.