#21647D
Closest named color: Denim (#3B638C). oklch(47.3% 0.077 226.9), rgb(33, 100, 125).
Aa
White text reads best on this color (6.59:1).
About this color
#21647D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 47%, its chroma 0.077 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.036 away. White text reads best on it, at 6.59:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.18:1 |
| White text | 6.59:1 |
Values
| HEX | #21647D |
| RGB | rgb(33, 100, 125) |
| HSL | hsl(196, 58%, 31%) |
| OKLCH | oklch(47.3% 0.077 226.9) |
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 #21647D | 6.59:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #21647D | 3.18:1 | AA large text | Lc 21.7 | Dividers and decoration only |
| #21647D text on white | 6.59:1 | AA | Lc 82.4 | Fine for body text |
| #21647D text on black | 3.18:1 | AA large text | Lc -19.5 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#A8C6D3
oklch(80.9% 0.037 225.9)
-
Step 400
400
#79A9BE
oklch(70.8% 0.06 226.9)
-
Step 500
500
#5493AD
oklch(63.1% 0.076 226.7)
-
Step 600
600
#367D99
oklch(55.7% 0.083 227.1)
-
Step 700
700 (this color)
#21647D
oklch(47.3% 0.077 226.9)
-
Step 800
800
#22566A
oklch(42.7% 0.064 226.6)
-
Step 900
900
#224756
oklch(37.7% 0.049 226.8)
-
Step 950
950
#152A32
oklch(27.1% 0.031 224.6)
#21647D 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) | #57627E | 0.057 |
| Deuteranopia (no green cones) | #4A597D | 0.050 |
| Tritanopia (no blue cones) | #006B6C | 0.043 |
| Achromatopsia (no color) | #5D5D5D | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21647D
#21647D
oklch(47.3% 0.077 226.9)
- #7F4D35
#7F4D35
oklch(47.2% 0.077 46)
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 #21647D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.036
- Petrol #005F6A ΔE 0.038
- YInMn Blue #415A77 ΔE 0.038
- Peacock Blue #016795 ΔE 0.038
- Dark Aqua #05696B ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.040
- Slate #516572 ΔE 0.051
- Sea Blue #047495 ΔE 0.053
Use #21647D 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.