#213745
Closest named color: Dark Blue Grey (#1F3B4D). oklch(32.5% 0.037 237.4), rgb(33, 55, 69).
Aa
White text reads best on this color (12.37:1).
About this color
#213745 is a dark, muted blue. In OKLCH its lightness is 32%, its chroma 0.037 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.017 away. White text reads best on it, at 12.37:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.69:1 |
| White text | 12.37:1 |
Values
| HEX | #213745 |
| RGB | rgb(33, 55, 69) |
| HSL | hsl(203, 35%, 20%) |
| OKLCH | oklch(32.5% 0.037 237.4) |
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 #213745 | 12.37:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #213745 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #213745 text on white | 12.37:1 | AAA | Lc 98.1 | Preferred for body text |
| #213745 text on black | 1.69:1 | Fails | Lc 0.0 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBEF
oklch(93.7% 0.008 236.6)
-
Step 200
200
#D0DBE2
oklch(88.5% 0.015 235.4)
-
Step 300
300
#B0C4D1
oklch(80.9% 0.029 236.3)
-
Step 400
400
#87A5BA
oklch(70.7% 0.045 238.8)
-
Step 500
500
#688FA8
oklch(63.1% 0.057 237)
-
Step 600
600
#4F7994
oklch(55.6% 0.063 237.6)
-
Step 700
700
#40667E
oklch(49.2% 0.058 237.3)
-
Step 800
800
#355366
oklch(42.7% 0.048 237.2)
-
Step 900
900 (this color)
#213745
oklch(32.5% 0.037 237.4)
-
Step 950
950
#1B2831
oklch(26.9% 0.025 239.1)
#213745 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) | #313746 | 0.023 |
| Deuteranopia (no green cones) | #2C3345 | 0.019 |
| Tritanopia (no blue cones) | #113B3C | 0.029 |
| Achromatopsia (no color) | #343434 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #213745
#213745
oklch(32.5% 0.037 237.4)
- #432F21
#432F21
oklch(32.5% 0.038 56)
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 #213745, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.017
- Gunmetal #293241 ΔE 0.018
- Midnight Green #073B4C ΔE 0.024
- Onyx #343A40 ΔE 0.032
- Space Cadet #2B2D42 ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.035
- Charcoal #264653 ΔE 0.051
- Charcoal Grey #3C4142 ΔE 0.056
Use #213745 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.