#21546D
Closest named color: Deep Sea Blue (#015482). oklch(42.3% 0.068 232.9), rgb(33, 84, 109).
Aa
White text reads best on this color (8.22:1).
About this color
#21546D is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.068 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.037 away. White text reads best on it, at 8.22:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.55:1 |
| White text | 8.22:1 |
Values
| HEX | #21546D |
| RGB | rgb(33, 84, 109) |
| HSL | hsl(200, 54%, 28%) |
| OKLCH | oklch(42.3% 0.068 232.9) |
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 #21546D | 8.22:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #21546D | 2.55:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #21546D text on white | 8.22:1 | AAA | Lc 88.2 | Fine for body text |
| #21546D text on black | 2.55:1 | Fails | Lc -14.0 | 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 800.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE6
oklch(88.5% 0.022 235)
-
Step 300
300
#A8C6D6
oklch(81% 0.039 231.2)
-
Step 400
400
#78A8C2
oklch(70.7% 0.064 232.5)
-
Step 500
500
#5392B3
oklch(63.1% 0.082 233)
-
Step 600
600
#357C9F
oklch(55.7% 0.089 233)
-
Step 700
700
#276888
oklch(49.1% 0.083 233.5)
-
Step 800
800 (this color)
#21546D
oklch(42.3% 0.068 232.9)
-
Step 900
900
#224659
oklch(37.6% 0.053 233.6)
-
Step 950
950
#152934
oklch(26.9% 0.033 233.9)
#21546D 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) | #48536E | 0.045 |
| Deuteranopia (no green cones) | #3D4B6D | 0.039 |
| Tritanopia (no blue cones) | #005B5C | 0.045 |
| Achromatopsia (no color) | #4F4F4F | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21546D
#21546D
oklch(42.3% 0.068 232.9)
- #6B4329
#6B4329
oklch(42.3% 0.068 52.9)
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 #21546D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.037
- Petrol #005F6A ΔE 0.038
- Deep Teal #00555A ΔE 0.040
- YInMn Blue #415A77 ΔE 0.044
- Light Navy #155084 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.049
Use #21546D 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.