#305E5F
Closest named color: Dark Green Blue (#1F6357). oklch(45% 0.051 197.4), rgb(48, 94, 95).
Aa
White text reads best on this color (7.26:1).
About this color
#305E5F is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.051 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.028 away. White text reads best on it, at 7.26:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.89:1 |
| White text | 7.26:1 |
Values
| HEX | #305E5F |
| RGB | rgb(48, 94, 95) |
| HSL | hsl(181, 33%, 28%) |
| OKLCH | oklch(45% 0.051 197.4) |
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 #305E5F | 7.26:1 | AAA | Lc -90.0 | Fine for body text |
| Black text on #305E5F | 2.89:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #305E5F text on white | 7.26:1 | AAA | Lc 85.1 | Fine for body text |
| #305E5F text on black | 2.89:1 | Fails | Lc -16.9 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEC
oklch(93.7% 0.009 197)
-
Step 200
200
#CDDDDD
oklch(88.6% 0.017 196.8)
-
Step 300
300
#ABC7C7
oklch(80.9% 0.03 196.6)
-
Step 400
400
#7EAAAB
oklch(70.7% 0.047 197.9)
-
Step 500
500
#5B9596
oklch(63.1% 0.061 197.1)
-
Step 600
600
#3F7F81
oklch(55.5% 0.066 198.1)
-
Step 700
700
#316B6D
oklch(49% 0.06 198.4)
-
Step 800
800 (this color)
#305E5F
oklch(45% 0.051 197.4)
-
Step 900
900
#274849
oklch(37.7% 0.039 198.1)
-
Step 950
950
#172A2B
oklch(26.9% 0.025 200)
#305E5F 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) | #595A5F | 0.053 |
| Deuteranopia (no green cones) | #50545F | 0.048 |
| Tritanopia (no blue cones) | #16615E | 0.021 |
| Achromatopsia (no color) | #575757 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305E5F
#305E5F
oklch(45% 0.051 197.4)
- #6F4A4B
#6F4A4B
oklch(45.1% 0.051 17.5)
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 #305E5F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.028
- Petrol #005F6A ΔE 0.029
- Dark Aqua #05696B ΔE 0.037
- Deep Teal #00555A ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.049
- YInMn Blue #415A77 ΔE 0.051
- Slate #516572 ΔE 0.056
- Dark Blue Green #005249 ΔE 0.062
Use #305E5F 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.