#2C3B6E
Closest named color: Twilight Blue (#0A437A). oklch(36.7% 0.09 269.3), rgb(44, 59, 110).
Aa
White text reads best on this color (10.72:1).
About this color
#2C3B6E is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.090 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.037 away. White text reads best on it, at 10.72:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.95:1 |
| White text | 10.72:1 |
Values
| HEX | #2C3B6E |
| RGB | rgb(44, 59, 110) |
| HSL | hsl(226, 43%, 30%) |
| OKLCH | oklch(36.7% 0.09 269.3) |
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 #2C3B6E | 10.72:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #2C3B6E | 1.95:1 | Fails | Lc 9.2 | Not readable |
| #2C3B6E text on white | 10.72:1 | AAA | Lc 94.7 | Preferred for body text |
| #2C3B6E text on black | 1.95:1 | Fails | Lc -7.9 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CFD9F3
oklch(88.6% 0.037 268.9)
-
Step 300
300
#AFBFED
oklch(80.8% 0.068 269.9)
-
Step 400
400
#859DE4
oklch(70.6% 0.108 269.3)
-
Step 500
500
#6883DC
oklch(63% 0.138 269.4)
-
Step 600
600
#516BCA
oklch(55.6% 0.15 269.5)
-
Step 700
700
#4159AF
oklch(49.1% 0.14 269)
-
Step 800
800
#36498D
oklch(42.7% 0.115 269.3)
-
Step 900
900 (this color)
#2C3B6E
oklch(36.7% 0.09 269.3)
-
Step 950
950
#1B2442
oklch(26.9% 0.057 269.6)
#2C3B6E 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) | #244170 | 0.019 |
| Deuteranopia (no green cones) | #1C3B6D | 0.019 |
| Tritanopia (no blue cones) | #01464F | 0.080 |
| Achromatopsia (no color) | #3E3E3E | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C3B6E
#2C3B6E
oklch(36.7% 0.09 269.3)
- #4F3C00
#4F3C00
oklch(36.7% 0.075 88.5)
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 #2C3B6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.037
- Marine Blue #01386A ΔE 0.041
- Prussian Blue #1D3557 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.053
- Cobalt #1E488F ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.062
- Marine #042E60 ΔE 0.065
- Charcoal #264653 ΔE 0.066
Use #2C3B6E 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.