#23404B
Closest named color: Dark Blue Grey (#1F3B4D). oklch(35.4% 0.04 224.4), rgb(35, 64, 75).
Aa
White text reads best on this color (11.01:1).
About this color
#23404B is a dark, muted teal or cyan. In OKLCH its lightness is 35%, its chroma 0.040 and its hue 224°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.019 away. White text reads best on it, at 11.01:1.
| Hue family | Teals and cyans |
| Lightness | dark (35%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.90:1 |
| White text | 11.01:1 |
Values
| HEX | #23404B |
| RGB | rgb(35, 64, 75) |
| HSL | hsl(197, 36%, 22%) |
| OKLCH | oklch(35.4% 0.04 224.4) |
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 #23404B | 11.01:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #23404B | 1.90:1 | Fails | Lc 8.5 | Not readable |
| #23404B text on white | 11.01:1 | AAA | Lc 95.4 | Preferred for body text |
| #23404B text on black | 1.90:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE1
oklch(88.5% 0.017 221.1)
-
Step 300
300
#ADC5CF
oklch(80.9% 0.03 224.8)
-
Step 400
400
#81A8B7
oklch(70.8% 0.048 223.5)
-
Step 500
500
#6092A5
oklch(63.2% 0.061 223.9)
-
Step 600
600
#457C90
oklch(55.6% 0.066 223.7)
-
Step 700
700
#36687B
oklch(49% 0.062 225)
-
Step 800
800
#2D5564
oklch(42.7% 0.051 224.5)
-
Step 900
900 (this color)
#23404B
oklch(35.4% 0.04 224.4)
-
Step 950
950
#192930
oklch(27% 0.025 227.2)
#23404B 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) | #3A3F4C | 0.032 |
| Deuteranopia (no green cones) | #343A4B | 0.029 |
| Tritanopia (no blue cones) | #0F4343 | 0.027 |
| Achromatopsia (no color) | #3C3C3C | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23404B
#23404B
oklch(35.4% 0.04 224.4)
- #4D352A
#4D352A
oklch(35.4% 0.039 45.6)
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 #23404B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.019
- Charcoal #264653 ΔE 0.022
- Onyx #343A40 ΔE 0.029
- Midnight Green #073B4C ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.037
- Dark Teal #014D4E ΔE 0.044
- Gunmetal #293241 ΔE 0.045
Use #23404B 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.