#21697E
Closest named color: Dark Aqua (#05696B). oklch(48.6% 0.077 221.3), rgb(33, 105, 126).
Aa
White text reads best on this color (6.20:1).
About this color
#21697E is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 49%, its chroma 0.077 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.035 away. White text reads best on it, at 6.20:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.38:1 |
| White text | 6.20:1 |
Values
| HEX | #21697E |
| RGB | rgb(33, 105, 126) |
| HSL | hsl(194, 58%, 31%) |
| OKLCH | oklch(48.6% 0.077 221.3) |
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 #21697E | 6.20:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #21697E | 3.38:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #21697E text on white | 6.20:1 | AA | Lc 80.6 | Fine for body text |
| #21697E text on black | 3.38:1 | AA large text | Lc -21.2 | 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
#E3ECEF
oklch(93.7% 0.01 219.6)
-
Step 200
200
#CBDDE3
oklch(88.6% 0.021 219.7)
-
Step 300
300
#A7C7D2
oklch(81% 0.038 220.6)
-
Step 400
400
#77AABB
oklch(70.8% 0.059 220.7)
-
Step 500
500
#5194AA
oklch(63.1% 0.076 221.5)
-
Step 600
600
#317E95
oklch(55.5% 0.082 221)
-
Step 700
700 (this color)
#21697E
oklch(48.6% 0.077 221.3)
-
Step 800
800
#1F5768
oklch(42.8% 0.064 221.4)
-
Step 900
900
#204854
oklch(37.8% 0.049 220.1)
-
Step 950
950
#142A31
oklch(27% 0.031 220.6)
#21697E 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) | #5D667F | 0.063 |
| Deuteranopia (no green cones) | #505D7E | 0.056 |
| Tritanopia (no blue cones) | #007070 | 0.038 |
| Achromatopsia (no color) | #616161 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21697E
#21697E
oklch(48.6% 0.077 221.3)
- #84503D
#84503D
oklch(48.6% 0.076 40.8)
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 #21697E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.035
- Denim #3B638C ΔE 0.040
- Deep Turquoise #017374 ΔE 0.041
- Peacock Blue #016795 ΔE 0.041
- Sea Blue #047495 ΔE 0.042
- Dark Aquamarine #017371 ΔE 0.044
- Petrol #005F6A ΔE 0.045
- Deep Aqua #08787F ΔE 0.046
Use #21697E 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.