#2C4688
Closest named color: Cobalt (#1E488F). oklch(41.1% 0.115 265.5), rgb(44, 70, 136).
Aa
White text reads best on this color (8.97:1).
About this color
#2C4688 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.115 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.017 away. White text reads best on it, at 8.97:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.33:1 |
| White text | 8.97:1 |
Values
| HEX | #2C4688 |
| RGB | rgb(44, 70, 136) |
| HSL | hsl(223, 51%, 35%) |
| OKLCH | oklch(41.1% 0.115 265.5) |
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 #2C4688 | 8.97:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #2C4688 | 2.33:1 | Fails | Lc 13.6 | Not readable |
| #2C4688 text on white | 8.97:1 | AAA | Lc 90.3 | Preferred for body text |
| #2C4688 text on black | 2.33:1 | Fails | Lc -11.9 | 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 800.
-
Step 50
50
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F3
oklch(88.4% 0.038 265.8)
-
Step 300
300
#ACC0ED
oklch(80.8% 0.068 266.1)
-
Step 400
400
#809FE4
oklch(70.7% 0.107 265.3)
-
Step 500
500
#6185DC
oklch(63% 0.138 265.7)
-
Step 600
600
#496DCA
oklch(55.6% 0.15 265.8)
-
Step 700
700
#3A5BAE
oklch(49.1% 0.138 265.3)
-
Step 800
800 (this color)
#2C4688
oklch(41.1% 0.115 265.5)
-
Step 900
900
#2A3F71
oklch(37.7% 0.09 265.2)
-
Step 950
950
#192542
oklch(27% 0.057 265.8)
#2C4688 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) | #244E8A | 0.023 |
| Deuteranopia (no green cones) | #124587 | 0.023 |
| Tritanopia (no blue cones) | #005560 | 0.095 |
| Achromatopsia (no color) | #494949 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C4688
#2C4688
oklch(41.1% 0.115 265.5)
- #5F4600
#5F4600
oklch(41% 0.084 85.2)
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 #2C4688, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.017
- Light Navy #155084 ΔE 0.034
- Dusk Blue #26538D ΔE 0.037
- Twilight Blue #0A437A ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.044
- Blueberry #464196 ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.048
- Twilight #4E518B ΔE 0.059
Use #2C4688 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.