#243E48
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.7% 0.036 224.5), rgb(36, 62, 72).
Aa
White text reads best on this color (11.30:1).
About this color
#243E48 is a dark, muted teal or cyan. In OKLCH its lightness is 35%, its chroma 0.036 and its hue 224°. 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 11.30:1.
| Hue family | Teals and cyans |
| Lightness | dark (35%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.85:1 |
| White text | 11.30:1 |
Values
| HEX | #243E48 |
| RGB | rgb(36, 62, 72) |
| HSL | hsl(197, 33%, 21%) |
| OKLCH | oklch(34.7% 0.036 224.5) |
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 #243E48 | 11.30:1 | AAA | Lc -99.8 | Preferred for body text |
| Black text on #243E48 | 1.85:1 | Fails | Lc 7.9 | Not readable |
| #243E48 text on white | 11.30:1 | AAA | Lc 96.0 | Preferred for body text |
| #243E48 text on black | 1.85:1 | 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
#CFDBE1
oklch(88.4% 0.015 229)
-
Step 300
300
#AFC5CE
oklch(81% 0.027 224.3)
-
Step 400
400
#84A7B5
oklch(70.7% 0.043 224.3)
-
Step 500
500
#6491A3
oklch(63.1% 0.056 224.9)
-
Step 600
600
#4A7B8E
oklch(55.6% 0.061 224.8)
-
Step 700
700
#3B6879
oklch(49.2% 0.056 224.4)
-
Step 800
800
#315562
oklch(42.8% 0.047 223.2)
-
Step 900
900 (this color)
#243E48
oklch(34.7% 0.036 224.5)
-
Step 950
950
#1A292F
oklch(27% 0.023 224.8)
#243E48 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) | #383D49 | 0.028 |
| Deuteranopia (no green cones) | #333948 | 0.025 |
| Tritanopia (no blue cones) | #144141 | 0.024 |
| Achromatopsia (no color) | #3A3A3A | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243E48
#243E48
oklch(34.7% 0.036 224.5)
- #4A342A
#4A342A
oklch(34.7% 0.036 45.5)
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 #243E48, 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
- Onyx #343A40 ΔE 0.025
- Midnight Green #073B4C ΔE 0.029
- Charcoal #264653 ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.038
- Gunmetal #293241 ΔE 0.038
- Dark Grey Blue #29465B ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.047
Use #243E48 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.