#21605E
Closest named color: Dark Green Blue (#1F6357). oklch(44.9% 0.063 192.2), rgb(33, 96, 94).
Aa
White text reads best on this color (7.24:1).
About this color
#21605E is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.063 and its hue 192°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.018 away. White text reads best on it, at 7.24:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.89:1 |
| White text | 7.24:1 |
Values
| HEX | #21605E |
| RGB | rgb(33, 96, 94) |
| HSL | hsl(178, 49%, 25%) |
| OKLCH | oklch(44.9% 0.063 192.2) |
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 #21605E | 7.24:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #21605E | 2.89:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #21605E text on white | 7.24:1 | AAA | Lc 84.9 | Fine for body text |
| #21605E text on black | 2.89:1 | Fails | Lc -17.1 | 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 800.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CBDEDC
oklch(88.6% 0.02 189.2)
-
Step 300
300
#A6C9C7
oklch(81% 0.037 192.2)
-
Step 400
400
#74ADAA
oklch(70.7% 0.06 191.7)
-
Step 500
500
#4C9895
oklch(63.1% 0.076 192)
-
Step 600
600
#298280
oklch(55.5% 0.082 192.9)
-
Step 700
700
#1A6E6C
oklch(49% 0.076 192.6)
-
Step 800
800 (this color)
#21605E
oklch(44.9% 0.063 192.2)
-
Step 900
900
#1D4A48
oklch(37.7% 0.049 191.3)
-
Step 950
950
#122B2A
oklch(26.9% 0.031 192.1)
#21605E 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) | #5A5B5E | 0.067 |
| Deuteranopia (no green cones) | #50545F | 0.062 |
| Tritanopia (no blue cones) | #00635F | 0.015 |
| Achromatopsia (no color) | #575757 | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21605E
#21605E
oklch(44.9% 0.063 192.2)
- #74464B
#74464B
oklch(44.9% 0.064 12.9)
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 #21605E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.018
- Petrol #005F6A ΔE 0.024
- Dark Aqua #05696B ΔE 0.030
- Deep Teal #00555A ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.052
- Dark Blue Green #005249 ΔE 0.057
- Dark Aquamarine #017371 ΔE 0.058
- Deep Turquoise #017374 ΔE 0.059
Use #21605E 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.