#223B47
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.7% 0.037 230.1), rgb(34, 59, 71).
Aa
White text reads best on this color (11.76:1).
About this color
#223B47 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.037 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.011 away. White text reads best on it, at 11.76:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.78:1 |
| White text | 11.76:1 |
Values
| HEX | #223B47 |
| RGB | rgb(34, 59, 71) |
| HSL | hsl(199, 35%, 21%) |
| OKLCH | oklch(33.7% 0.037 230.1) |
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 #223B47 | 11.76:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #223B47 | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #223B47 text on white | 11.76:1 | AAA | Lc 96.9 | Preferred for body text |
| #223B47 text on black | 1.78:1 | 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
#CFDBE2
oklch(88.4% 0.016 233)
-
Step 300
300
#AFC4CF
oklch(80.8% 0.028 230.4)
-
Step 400
400
#84A6B8
oklch(70.6% 0.046 231.3)
-
Step 500
500
#6590A6
oklch(63% 0.058 231.1)
-
Step 600
600
#4B7A91
oklch(55.5% 0.062 230.6)
-
Step 700
700
#3C677B
oklch(49.1% 0.058 229.5)
-
Step 800
800
#325464
oklch(42.7% 0.048 229.6)
-
Step 900
900 (this color)
#223B47
oklch(33.7% 0.037 230.1)
-
Step 950
950
#1A2930
oklch(27.1% 0.024 228.7)
#223B47 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) | #353A48 | 0.027 |
| Deuteranopia (no green cones) | #303647 | 0.024 |
| Tritanopia (no blue cones) | #113E3F | 0.026 |
| Achromatopsia (no color) | #383838 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #223B47
#223B47
oklch(33.7% 0.037 230.1)
- #473226
#473226
oklch(33.8% 0.037 50.8)
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 #223B47, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.011
- Midnight Green #073B4C ΔE 0.023
- Onyx #343A40 ΔE 0.026
- Gunmetal #293241 ΔE 0.029
- Charcoal #264653 ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.045
- Charcoal Grey #3C4142 ΔE 0.046
Use #223B47 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.