#243E60
Closest named color: Dark Grey Blue (#29465B). oklch(36% 0.067 255.7), rgb(36, 62, 96).
Aa
White text reads best on this color (10.86:1).
About this color
#243E60 is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.067 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.031 away. White text reads best on it, at 10.86:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.93:1 |
| White text | 10.86:1 |
Values
| HEX | #243E60 |
| RGB | rgb(36, 62, 96) |
| HSL | hsl(214, 45%, 26%) |
| OKLCH | oklch(36% 0.067 255.7) |
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 #243E60 | 10.86:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #243E60 | 1.93:1 | Fails | Lc 8.9 | Not readable |
| #243E60 text on white | 10.86:1 | AAA | Lc 95.0 | Preferred for body text |
| #243E60 text on black | 1.93:1 | Fails | Lc -7.6 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CDDAEC
oklch(88.4% 0.029 256.5)
-
Step 300
300
#ACC3E2
oklch(81% 0.051 255.9)
-
Step 400
400
#7FA3D3
oklch(70.7% 0.081 255.8)
-
Step 500
500
#5E8BC7
oklch(63% 0.104 255.9)
-
Step 600
600
#4475B4
oklch(55.7% 0.112 255.4)
-
Step 700
700
#35629B
oklch(49.2% 0.105 255.3)
-
Step 800
800
#2D507E
oklch(42.8% 0.087 255.9)
-
Step 900
900 (this color)
#243E60
oklch(36% 0.067 255.7)
-
Step 950
950
#18273B
oklch(27% 0.043 255.9)
#243E60 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) | #304061 | 0.017 |
| Deuteranopia (no green cones) | #283A5F | 0.013 |
| Tritanopia (no blue cones) | #00464A | 0.059 |
| Achromatopsia (no color) | #3D3D3D | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #243E60
#243E60
oklch(36% 0.067 255.7)
- #51380C
#51380C
oklch(36.1% 0.067 77)
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 #243E60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.031
- Prussian Blue #1D3557 ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.034
- Charcoal #264653 ΔE 0.039
- Marine Blue #01386A ΔE 0.040
- Midnight Green #073B4C ΔE 0.046
- Twilight Blue #0A437A ΔE 0.046
- Onyx #343A40 ΔE 0.056
Use #243E60 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.