#2D537B
Closest named color: Deep Sea Blue (#015482). oklch(43.3% 0.08 251.2), rgb(45, 83, 123).
Aa
White text reads best on this color (7.96:1).
About this color
#2D537B is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.080 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.027 away. White text reads best on it, at 7.96:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.63:1 |
| White text | 7.96:1 |
Values
| HEX | #2D537B |
| RGB | rgb(45, 83, 123) |
| HSL | hsl(211, 46%, 33%) |
| OKLCH | oklch(43.3% 0.08 251.2) |
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 #2D537B | 7.96:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #2D537B | 2.63:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #2D537B text on white | 7.96:1 | AAA | Lc 87.5 | Fine for body text |
| #2D537B text on black | 2.63:1 | Fails | Lc -14.7 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#ABC3DE
oklch(80.8% 0.046 251.5)
-
Step 400
400
#7EA4CE
oklch(70.6% 0.075 251.4)
-
Step 500
500
#5D8DC1
oklch(63.1% 0.095 251.4)
-
Step 600
600
#4276AE
oklch(55.5% 0.104 251.8)
-
Step 700
700
#336395
oklch(49% 0.096 251.2)
-
Step 800
800 (this color)
#2D537B
oklch(43.3% 0.08 251.2)
-
Step 900
900
#274361
oklch(37.5% 0.062 251.3)
-
Step 950
950
#182839
oklch(27.1% 0.038 250.8)
#2D537B 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) | #42557D | 0.027 |
| Deuteranopia (no green cones) | #384D7A | 0.020 |
| Tritanopia (no blue cones) | #005C61 | 0.065 |
| Achromatopsia (no color) | #515151 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D537B
#2D537B
oklch(43.3% 0.08 251.2)
- #6C4817
#6C4817
oklch(43.3% 0.08 70.6)
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 #2D537B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.027
- Light Navy #155084 ΔE 0.027
- Dusk Blue #26538D ΔE 0.030
- YInMn Blue #415A77 ΔE 0.035
- Dusk #4E5481 ΔE 0.044
- Denim Blue #3B5B92 ΔE 0.046
- Twilight #4E518B ΔE 0.052
Use #2D537B 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.