#233B43
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.6% 0.033 221.1), rgb(35, 59, 67).
Aa
White text reads best on this color (11.81:1).
About this color
#233B43 is a dark, muted teal or cyan. In OKLCH its lightness is 34%, its chroma 0.033 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.018 away. White text reads best on it, at 11.81:1.
| Hue family | Teals and cyans |
| Lightness | dark (34%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.77:1 |
| White text | 11.81:1 |
Values
| HEX | #233B43 |
| RGB | rgb(35, 59, 67) |
| HSL | hsl(195, 31%, 20%) |
| OKLCH | oklch(33.6% 0.033 221.1) |
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 #233B43 | 11.81:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #233B43 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #233B43 text on white | 11.81:1 | AAA | Lc 97.0 | Preferred for body text |
| #233B43 text on black | 1.77:1 | 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
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DBDF
oklch(88.4% 0.013 221.4)
-
Step 300
300
#B0C5CC
oklch(81% 0.025 219.8)
-
Step 400
400
#86A7B2
oklch(70.7% 0.04 220.1)
-
Step 500
500
#67919F
oklch(63.1% 0.05 220.6)
-
Step 600
600
#4E7B8A
oklch(55.6% 0.054 221.1)
-
Step 700
700
#3E6875
oklch(49.2% 0.051 219.7)
-
Step 800
800
#34555F
oklch(42.8% 0.042 219.1)
-
Step 900
900 (this color)
#233B43
oklch(33.6% 0.033 221.1)
-
Step 950
950
#1B292E
oklch(27% 0.021 222)
#233B43 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) | #363A43 | 0.027 |
| Deuteranopia (no green cones) | #313643 | 0.024 |
| Tritanopia (no blue cones) | #153E3D | 0.022 |
| Achromatopsia (no color) | #383838 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #233B43
#233B43
oklch(33.6% 0.033 221.1)
- #46312A
#46312A
oklch(33.5% 0.033 39.2)
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 #233B43, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.018
- Onyx #343A40 ΔE 0.024
- Midnight Green #073B4C ΔE 0.027
- Gunmetal #293241 ΔE 0.030
- Charcoal #264653 ΔE 0.041
- Charcoal Grey #3C4142 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.047
Use #233B43 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.