#2D4189
Closest named color: Cobalt (#1E488F). oklch(40.1% 0.122 268.7), rgb(45, 65, 137).
Aa
White text reads best on this color (9.42:1).
About this color
#2D4189 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.122 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.023 away. White text reads best on it, at 9.42:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.22:1 |
| White text | 9.42:1 |
Values
| HEX | #2D4189 |
| RGB | rgb(45, 65, 137) |
| HSL | hsl(227, 51%, 36%) |
| OKLCH | oklch(40.1% 0.122 268.7) |
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 #2D4189 | 9.42:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #2D4189 | 2.22:1 | Fails | Lc 12.5 | Not readable |
| #2D4189 text on white | 9.42:1 | AAA | Lc 91.5 | Preferred for body text |
| #2D4189 text on black | 2.22:1 | Fails | Lc -10.9 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD9FC
oklch(88.6% 0.051 268.1)
-
Step 300
300
#A8BFFD
oklch(81% 0.092 268.6)
-
Step 400
400
#7B9BFC
oklch(70.8% 0.147 268.7)
-
Step 500
500
#5B7EF9
oklch(63.1% 0.187 268.6)
-
Step 600
600
#4463E8
oklch(55.5% 0.204 268.8)
-
Step 700
700
#3651CA
oklch(49% 0.19 268.7)
-
Step 800
800
#2D43A3
oklch(42.6% 0.157 268.9)
-
Step 900
900 (this color)
#2D4189
oklch(40.1% 0.122 268.7)
-
Step 950
950
#17234C
oklch(27.1% 0.077 268.6)
#2D4189 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) | #174A8C | 0.029 |
| Deuteranopia (no green cones) | #004288 | 0.033 |
| Tritanopia (no blue cones) | #00525E | 0.103 |
| Achromatopsia (no color) | #464646 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D4189
#2D4189
oklch(40.1% 0.122 268.7)
- #5A4500
#5A4500
oklch(40.2% 0.082 88.8)
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 #2D4189, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.023
- Dark Slate Blue #483D8B ΔE 0.040
- Twilight Blue #0A437A ΔE 0.040
- Blueberry #464196 ΔE 0.042
- Light Navy #155084 ΔE 0.047
- Dusk Blue #26538D ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.061
- Sapphire #2138AB ΔE 0.062
Use #2D4189 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.