#2D437D
Closest named color: Twilight Blue (#0A437A). oklch(39.7% 0.102 266.2), rgb(45, 67, 125).
Aa
White text reads best on this color (9.49:1).
About this color
#2D437D is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.102 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.030 away. White text reads best on it, at 9.49:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #2D437D |
| RGB | rgb(45, 67, 125) |
| HSL | hsl(224, 47%, 33%) |
| OKLCH | oklch(39.7% 0.102 266.2) |
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 #2D437D | 9.49:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #2D437D | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #2D437D text on white | 9.49:1 | AAA | Lc 91.8 | Preferred for body text |
| #2D437D text on black | 2.21:1 | Fails | Lc -10.6 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCD9F6
oklch(88.5% 0.042 266.3)
-
Step 300
300
#AAC0F3
oklch(80.9% 0.076 266.5)
-
Step 400
400
#7D9EED
oklch(70.7% 0.122 266.1)
-
Step 500
500
#5D83E7
oklch(63% 0.156 266.3)
-
Step 600
600
#456BD5
oklch(55.7% 0.169 266.2)
-
Step 700
700
#3758B9
oklch(49.1% 0.158 266.4)
-
Step 800
800
#2D4995
oklch(42.7% 0.129 265.9)
-
Step 900
900 (this color)
#2D437D
oklch(39.7% 0.102 266.2)
-
Step 950
950
#182446
oklch(26.9% 0.065 267.3)
#2D437D 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) | #28497F | 0.017 |
| Deuteranopia (no green cones) | #1B427C | 0.020 |
| Tritanopia (no blue cones) | #00505A | 0.086 |
| Achromatopsia (no color) | #464646 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D437D
#2D437D
oklch(39.7% 0.102 266.2)
- #5A4300
#5A4300
oklch(39.7% 0.081 86.3)
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 #2D437D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.030
- Cobalt #1E488F ΔE 0.033
- Light Navy #155084 ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.049
- Dusk Blue #26538D ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.052
- Blueberry #464196 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.062
Use #2D437D 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.