#21496D
Closest named color: Dark Grey Blue (#29465B). oklch(39.5% 0.076 248.1), rgb(33, 73, 109).
Aa
White text reads best on this color (9.38:1).
About this color
#21496D is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.076 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.030 away. White text reads best on it, at 9.38:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.23:1 |
| White text | 9.38:1 |
Values
| HEX | #21496D |
| RGB | rgb(33, 73, 109) |
| HSL | hsl(208, 54%, 28%) |
| OKLCH | oklch(39.5% 0.076 248.1) |
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 #21496D | 9.38:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #21496D | 2.23:1 | Fails | Lc 12.5 | Not readable |
| #21496D text on white | 9.38:1 | AAA | Lc 91.5 | Preferred for body text |
| #21496D text on black | 2.23:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#C9DCEE
oklch(88.6% 0.032 246.7)
-
Step 300
300
#A4C5E4
oklch(81% 0.057 246.9)
-
Step 400
400
#72A6D7
oklch(70.8% 0.091 247.8)
-
Step 500
500
#4A8ECC
oklch(63% 0.117 248.2)
-
Step 600
600
#2977B9
oklch(55.5% 0.127 248.2)
-
Step 700
700
#1B64A0
oklch(49.1% 0.118 248.4)
-
Step 800
800
#195281
oklch(42.7% 0.097 247.7)
-
Step 900
900 (this color)
#21496D
oklch(39.5% 0.076 248.1)
-
Step 950
950
#12283D
oklch(27% 0.048 249)
#21496D 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) | #394A6F | 0.029 |
| Deuteranopia (no green cones) | #2F436C | 0.022 |
| Tritanopia (no blue cones) | #005256 | 0.059 |
| Achromatopsia (no color) | #464646 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21496D
#21496D
oklch(39.5% 0.076 248.1)
- #613D10
#613D10
oklch(39.4% 0.077 67.4)
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 #21496D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.030
- Twilight Blue #0A437A ΔE 0.036
- Light Navy #155084 ΔE 0.040
- Deep Sea Blue #015482 ΔE 0.043
- Charcoal #264653 ΔE 0.044
- Dusk Blue #26538D ΔE 0.058
- Cobalt #1E488F ΔE 0.058
- Deep Teal #00555A ΔE 0.060
Use #21496D 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.