#51848A
Closest named color: Grey Blue (#647D8E). oklch(58% 0.055 205.3), rgb(81, 132, 138).
Aa
Black text reads best on this color (5.01:1).
About this color
#51848A is a medium-dark, muted teal or cyan. In OKLCH its lightness is 58%, its chroma 0.055 and its hue 205°. Its hue sits on the cool side of the wheel. The nearest named color is Grey Blue (#647D8E), ΔE 0.031 away. Black text reads best on it, at 5.01:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Grey Blue (#647D8E) |
| Black text | 5.01:1 |
| White text | 4.18:1 |
Values
| HEX | #51848A |
| RGB | rgb(81, 132, 138) |
| HSL | hsl(186, 26%, 43%) |
| OKLCH | oklch(58% 0.055 205.3) |
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 #51848A | 4.18:1 | AA large text | Lc -74.3 | Content text, not long reading |
| Black text on #51848A | 5.01:1 | AA | Lc 35.3 | Non-text elements, placeholder text |
| #51848A text on white | 4.18:1 | AA large text | Lc 68.8 | Content text, not long reading |
| #51848A text on black | 5.01:1 | AA | Lc -32.9 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#CFDCDD
oklch(88.5% 0.014 202.4)
-
Step 300
300
#AFC6C8
oklch(81% 0.025 203)
-
Step 400
400
#84A8AD
oklch(70.7% 0.04 206.8)
-
Step 500
500
#649398
oklch(63.1% 0.051 204.3)
-
Step 600
600 (this color)
#51848A
oklch(58% 0.055 205.3)
-
Step 700
700
#3B696F
oklch(49% 0.051 206.4)
-
Step 800
800
#31565A
oklch(42.7% 0.043 204.5)
-
Step 900
900
#2C474A
oklch(37.8% 0.033 204.7)
-
Step 950
950
#1A2A2B
oklch(27.1% 0.021 200.9)
#51848A 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) | #7D808A | 0.056 |
| Deuteranopia (no green cones) | #73798A | 0.050 |
| Tritanopia (no blue cones) | #388886 | 0.026 |
| Achromatopsia (no color) | #7C7C7C | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51848A
#51848A
oklch(58% 0.055 205.3)
- #996E6A
#996E6A
oklch(58.1% 0.056 24.9)
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 #51848A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grey Blue #647D8E ΔE 0.031
- Battleship Grey #6B7C85 ΔE 0.035
- Steel Grey #6F828A ΔE 0.036
- Dusty Teal #4C9085 ΔE 0.039
- Slate Gray #708090 ΔE 0.041
- Stormy Blue #507B9C ΔE 0.045
- Dark Cyan #008B8B ΔE 0.045
- Steel #738595 ΔE 0.046
Use #51848A 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.