#2C4666
Closest named color: Dark Grey Blue (#29465B). oklch(38.9% 0.063 254.3), rgb(44, 70, 102).
Aa
White text reads best on this color (9.65:1).
About this color
#2C4666 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.063 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.020 away. White text reads best on it, at 9.65:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.17:1 |
| White text | 9.65:1 |
Values
| HEX | #2C4666 |
| RGB | rgb(44, 70, 102) |
| HSL | hsl(213, 40%, 29%) |
| OKLCH | oklch(38.9% 0.063 254.3) |
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 #2C4666 | 9.65:1 | AAA | Lc -96.5 | Preferred for body text |
| Black text on #2C4666 | 2.17:1 | Fails | Lc 11.7 | Not readable |
| #2C4666 text on white | 9.65:1 | AAA | Lc 92.3 | Preferred for body text |
| #2C4666 text on black | 2.17:1 | Fails | Lc -10.2 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#ACC3DF
oklch(80.9% 0.047 253.5)
-
Step 400
400
#80A3D0
oklch(70.6% 0.077 255)
-
Step 500
500
#5F8CC3
oklch(63.1% 0.097 254.1)
-
Step 600
600
#4575B0
oklch(55.5% 0.106 254.5)
-
Step 700
700
#376297
oklch(49.1% 0.098 254.6)
-
Step 800
800
#2E507B
oklch(42.7% 0.082 255.1)
-
Step 900
900 (this color)
#2C4666
oklch(38.9% 0.063 254.3)
-
Step 950
950
#18273A
oklch(26.9% 0.041 254.8)
#2C4666 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) | #394867 | 0.019 |
| Deuteranopia (no green cones) | #324265 | 0.013 |
| Tritanopia (no blue cones) | #0A4D51 | 0.056 |
| Achromatopsia (no color) | #454545 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C4666
#2C4666
oklch(38.9% 0.063 254.3)
- #593F1A
#593F1A
oklch(38.9% 0.063 73.5)
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 #2C4666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.020
- Charcoal #264653 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.046
- Light Navy #155084 ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.056
- Deep Sea Blue #015482 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.061
Use #2C4666 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.