#212743
Closest named color: Oxford Blue (#1B263B). oklch(28.2% 0.052 273.4), rgb(33, 39, 67).
Aa
White text reads best on this color (14.62:1).
About this color
#212743 is a dark, muted blue. In OKLCH its lightness is 28%, its chroma 0.052 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.018 away. White text reads best on it, at 14.62:1.
| Hue family | Blues |
| Lightness | dark (28%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.43:1 |
| White text | 14.62:1 |
Values
| HEX | #212743 |
| RGB | rgb(33, 39, 67) |
| HSL | hsl(229, 34%, 20%) |
| OKLCH | oklch(28.2% 0.052 273.4) |
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 #212743 | 14.62:1 | AAA | Lc -104.3 | Preferred for body text |
| Black text on #212743 | 1.43:1 | Fails | Lc 0.0 | Not readable |
| #212743 text on white | 14.62:1 | AAA | Lc 101.4 | Preferred for body text |
| #212743 text on black | 1.43:1 | 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 950.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E6E9F6
oklch(93.6% 0.018 275.6)
-
Step 200
200
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B3BFE9
oklch(81% 0.061 272.5)
-
Step 400
400
#8D9CDF
oklch(70.7% 0.1 273.9)
-
Step 500
500
#7182D6
oklch(63% 0.128 273.5)
-
Step 600
600
#5A6AC3
oklch(55.5% 0.138 273.4)
-
Step 700
700
#4A58A8
oklch(49% 0.128 273.3)
-
Step 800
800
#3D4988
oklch(42.8% 0.105 273.1)
-
Step 900
900
#343D6D
oklch(37.7% 0.083 273.8)
-
Step 950
950 (this color)
#212743
oklch(28.2% 0.052 273.4)
#212743 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) | #1D2A44 | 0.011 |
| Deuteranopia (no green cones) | #1A2742 | 0.011 |
| Tritanopia (no blue cones) | #152D31 | 0.048 |
| Achromatopsia (no color) | #292929 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #212743
#212743
oklch(28.2% 0.052 273.4)
- #322805
#322805
oklch(28.1% 0.052 92.5)
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 #212743, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.018
- Space Cadet #2B2D42 ΔE 0.028
- Dark #1B2431 ΔE 0.036
- Gunmetal #293241 ΔE 0.042
- Jet #212529 ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.051
- Marine #042E60 ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.065
Use #212743 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.