#21647A
Closest named color: Petrol (#005F6A). oklch(47.1% 0.074 223.8), rgb(33, 100, 122).
Aa
White text reads best on this color (6.62:1).
About this color
#21647A is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 47%, its chroma 0.074 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.034 away. White text reads best on it, at 6.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 3.16:1 |
| White text | 6.62:1 |
Values
| HEX | #21647A |
| RGB | rgb(33, 100, 122) |
| HSL | hsl(195, 57%, 30%) |
| OKLCH | oklch(47.1% 0.074 223.8) |
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 #21647A | 6.62:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #21647A | 3.16:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #21647A text on white | 6.62:1 | AA | Lc 82.5 | Fine for body text |
| #21647A text on black | 3.16:1 | AA large text | Lc -19.4 | 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
#CCDCE3
oklch(88.5% 0.02 225.7)
-
Step 300
300
#A9C6D2
oklch(80.9% 0.036 224.7)
-
Step 400
400
#79A9BB
oklch(70.7% 0.057 223.2)
-
Step 500
500
#5493AA
oklch(63% 0.073 223.7)
-
Step 600
600
#367D96
oklch(55.5% 0.08 224.3)
-
Step 700
700 (this color)
#21647A
oklch(47.1% 0.074 223.8)
-
Step 800
800
#235668
oklch(42.7% 0.062 224.3)
-
Step 900
900
#224754
oklch(37.6% 0.048 223.3)
-
Step 950
950
#152A31
oklch(27.1% 0.03 221.5)
#21647A 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) | #58627B | 0.059 |
| Deuteranopia (no green cones) | #4B597A | 0.051 |
| Tritanopia (no blue cones) | #006B6B | 0.040 |
| Achromatopsia (no color) | #5D5D5D | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21647A
#21647A
oklch(47.1% 0.074 223.8)
- #7E4D38
#7E4D38
oklch(47.1% 0.074 43.8)
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 #21647A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.034
- Dark Aqua #05696B ΔE 0.036
- YInMn Blue #415A77 ΔE 0.039
- Denim #3B638C ΔE 0.040
- Peacock Blue #016795 ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.044
- Slate #516572 ΔE 0.050
- Deep Turquoise #017374 ΔE 0.051
Use #21647A 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.