#203D3F
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.8% 0.035 201.4), rgb(32, 61, 63).
Aa
White text reads best on this color (11.66:1).
About this color
#203D3F is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.035 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.028 away. White text reads best on it, at 11.66:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.80:1 |
| White text | 11.66:1 |
Values
| HEX | #203D3F |
| RGB | rgb(32, 61, 63) |
| HSL | hsl(184, 33%, 19%) |
| OKLCH | oklch(33.8% 0.035 201.4) |
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 #203D3F | 11.66:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #203D3F | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #203D3F text on white | 11.66:1 | AAA | Lc 96.7 | Preferred for body text |
| #203D3F text on black | 1.80:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CFDCDD
oklch(88.5% 0.014 202.4)
-
Step 300
300
#AEC6C8
oklch(80.9% 0.026 202.8)
-
Step 400
400
#82A9AB
oklch(70.7% 0.042 200.2)
-
Step 500
500
#629497
oklch(63.2% 0.054 200.7)
-
Step 600
600
#477E82
oklch(55.7% 0.059 201.7)
-
Step 700
700
#386A6E
oklch(49.1% 0.054 202.3)
-
Step 800
800
#2F5659
oklch(42.6% 0.045 202)
-
Step 900
900 (this color)
#203D3F
oklch(33.8% 0.035 201.4)
-
Step 950
950
#192A2B
oklch(27.1% 0.023 200.6)
#203D3F 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) | #393B3F | 0.035 |
| Deuteranopia (no green cones) | #34373F | 0.033 |
| Tritanopia (no blue cones) | #113F3E | 0.015 |
| Achromatopsia (no color) | #383838 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #203D3F
#203D3F
oklch(33.8% 0.035 201.4)
- #48302F
#48302F
oklch(33.7% 0.035 21.8)
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 #203D3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.028
- Onyx #343A40 ΔE 0.029
- Midnight Green #073B4C ΔE 0.032
- Gunmetal #293241 ΔE 0.040
- Charcoal #264653 ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.043
- Dark Teal #014D4E ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.054
Use #203D3F 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.