#243745
Closest named color: Dark Blue Grey (#1F3B4D). oklch(32.7% 0.035 241.1), rgb(36, 55, 69).
Aa
White text reads best on this color (12.29:1).
About this color
#243745 is a dark, muted blue. In OKLCH its lightness is 33%, its chroma 0.035 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.017 away. White text reads best on it, at 12.29:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.70:1 |
| White text | 12.29:1 |
Values
| HEX | #243745 |
| RGB | rgb(36, 55, 69) |
| HSL | hsl(205, 31%, 21%) |
| OKLCH | oklch(32.7% 0.035 241.1) |
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 #243745 | 12.29:1 | AAA | Lc -101.5 | Preferred for body text |
| Black text on #243745 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #243745 text on white | 12.29:1 | AAA | Lc 98.0 | Preferred for body text |
| #243745 text on black | 1.70:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EBEE
oklch(93.7% 0.007 233.6)
-
Step 200
200
#D1DBE2
oklch(88.6% 0.015 238)
-
Step 300
300
#B2C3D0
oklch(80.8% 0.026 240.7)
-
Step 400
400
#8AA5B9
oklch(70.8% 0.042 240.3)
-
Step 500
500
#6C8EA7
oklch(63% 0.054 240.5)
-
Step 600
600
#547893
oklch(55.6% 0.059 241.5)
-
Step 700
700
#44657D
oklch(49.1% 0.054 240.8)
-
Step 800
800
#385266
oklch(42.6% 0.046 242.2)
-
Step 900
900 (this color)
#243745
oklch(32.7% 0.035 241.1)
-
Step 950
950
#1D2830
oklch(27% 0.021 240.1)
#243745 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) | #313746 | 0.019 |
| Deuteranopia (no green cones) | #2D3345 | 0.018 |
| Tritanopia (no blue cones) | #173A3C | 0.027 |
| Achromatopsia (no color) | #353535 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243745
#243745
oklch(32.7% 0.035 241.1)
- #423122
#423122
oklch(32.8% 0.035 62.6)
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 #243745, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.017
- Gunmetal #293241 ΔE 0.017
- Midnight Green #073B4C ΔE 0.027
- Onyx #343A40 ΔE 0.029
- Space Cadet #2B2D42 ΔE 0.033
- Prussian Blue #1D3557 ΔE 0.036
- Charcoal #264653 ΔE 0.050
- Charcoal Grey #3C4142 ΔE 0.053
Use #243745 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.