#243D48
Closest named color: Dark Blue Grey (#1F3B4D). oklch(34.5% 0.036 227.7), rgb(36, 61, 72).
Aa
White text reads best on this color (11.43:1).
About this color
#243D48 is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.036 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.014 away. White text reads best on it, at 11.43:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.83:1 |
| White text | 11.43:1 |
Values
| HEX | #243D48 |
| RGB | rgb(36, 61, 72) |
| HSL | hsl(198, 33%, 21%) |
| OKLCH | oklch(34.5% 0.036 227.7) |
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 #243D48 | 11.43:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #243D48 | 1.83:1 | Fails | Lc 7.6 | Not readable |
| #243D48 text on white | 11.43:1 | AAA | Lc 96.3 | Preferred for body text |
| #243D48 text on black | 1.83:1 | 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
#AFC5CF
oklch(81% 0.028 226.9)
-
Step 400
400
#85A7B6
oklch(70.8% 0.043 226.6)
-
Step 500
500
#6591A4
oklch(63.2% 0.056 226.7)
-
Step 600
600
#4B7B8F
oklch(55.7% 0.061 226.5)
-
Step 700
700
#3C677A
oklch(49% 0.057 228.2)
-
Step 800
800
#325463
oklch(42.6% 0.047 227.9)
-
Step 900
900 (this color)
#243D48
oklch(34.5% 0.036 227.7)
-
Step 950
950
#1A292F
oklch(27% 0.023 224.8)
#243D48 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) | #373C49 | 0.027 |
| Deuteranopia (no green cones) | #323848 | 0.024 |
| Tritanopia (no blue cones) | #144040 | 0.026 |
| Achromatopsia (no color) | #3A3A3A | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243D48
#243D48
oklch(34.5% 0.036 227.7)
- #493329
#493329
oklch(34.4% 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 #243D48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.014
- Onyx #343A40 ΔE 0.024
- Midnight Green #073B4C ΔE 0.027
- Charcoal #264653 ΔE 0.032
- Gunmetal #293241 ΔE 0.035
- Charcoal Grey #3C4142 ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.044
Use #243D48 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.